diff --git a/.github/workflows/manual-build.yml b/.github/workflows/manual-build.yml
index 944f903..5eb59c2 100644
--- a/.github/workflows/manual-build.yml
+++ b/.github/workflows/manual-build.yml
@@ -1,11 +1,17 @@
 ---
 name: Manual Build & Push
 on:
- workflow_dispatch:
+  workflow_dispatch:
+    inputs:
+      platforms:
+        description: 'The platforms for which the Docker image should be built. If not specified, defaults to linux/amd64.'
+        required: false
+        default: 'linux/amd64,linux/arm64/v8'
 jobs:
   build-push:
-    uses: kbase/.github/.github/workflows/reusable_build-push.yml@main
+    uses: kbase/.github/.github/workflows/reusable_build-push.yml@multi-target
     with:
       name: '${{ github.event.repository.name }}-develop'
       tags: br-${{ github.ref_name }}
+      platforms: ${{ github.event.inputs.platforms }}
     secrets: inherit
diff --git a/.github/workflows/pr_build.yml b/.github/workflows/pr_build.yml
index 0fa1c46..5d07745 100644
--- a/.github/workflows/pr_build.yml
+++ b/.github/workflows/pr_build.yml
@@ -11,33 +11,49 @@ on:
       - reopened
       - synchronize
       - closed
+# Defaults to building for linux/amd64. Can modify be updating variable, e.g. PLATFORMS: 'linux/amd64,linux/arm64/v8'
+env:
+  PLATFORMS: 'linux/amd64,linux/arm64/v8'
 jobs:
+  set-platforms:
+    runs-on: ubuntu-latest
+    outputs:
+      platforms: ${{ steps.set-platforms.outputs.platforms }}
+    steps:
+      - name: Set platforms
+        id: set-platforms
+        run: echo "::set-output name=platforms::linux/amd64,linux/arm64/v8"
   build-develop-open:
     if: github.base_ref == 'develop' && github.event.pull_request.merged == false
-    uses: kbase/.github/.github/workflows/reusable_build.yml@main
+    uses: kbase/.github/.github/workflows/reusable_build.yml@multi-target
+    with:
+      platforms: ${{ needs.set-platforms.outputs.platforms }}
     secrets: inherit
   build-develop-merge:
     if: github.base_ref == 'develop' && github.event.pull_request.merged == true
-    uses: kbase/.github/.github/workflows/reusable_build-push.yml@main
+    uses: kbase/.github/.github/workflows/reusable_build-push.yml@multi-target
     with:
       name: '${{ github.event.repository.name }}-develop'
       tags: pr-${{ github.event.number }},latest
+      platforms: ${{ needs.set-platforms.outputs.platforms }}
     secrets: inherit
   build-main-open:
     if: (github.base_ref == 'main' || github.base_ref == 'master') && github.event.pull_request.merged == false
-    uses: kbase/.github/.github/workflows/reusable_build-push.yml@main
+    uses: kbase/.github/.github/workflows/reusable_build-push.yml@multi-target
     with:
       name: '${{ github.event.repository.name }}'
       tags: pr-${{ github.event.number }}
+      platforms: ${{ needs.set-platforms.outputs.platforms }}
     secrets: inherit
   build-main-merge:
     if: (github.base_ref == 'main' || github.base_ref == 'master') && github.event.pull_request.merged == true
-    uses: kbase/.github/.github/workflows/reusable_build-push.yml@main
+    uses: kbase/.github/.github/workflows/reusable_build-push.yml@multi-target
     with:
       name: '${{ github.event.repository.name }}'
       tags: pr-${{ github.event.number }},latest-rc
+      platforms: ${{ needs.set-platforms.outputs.platforms }}
     secrets: inherit
   trivy-scans:
     if: (github.base_ref == 'develop' || github.base_ref == 'main' || github.base_ref == 'master' ) && github.event.pull_request.merged == false
-    uses: kbase/.github/.github/workflows/reusable_trivy-scans.yml@main
+    uses: kbase/.github/.github/workflows/reusable_trivy-scans.yml@multi-target
     secrets: inherit
diff --git a/.github/workflows/release-main.yml b/.github/workflows/release-main.yml
index a254678..52f4517 100644
--- a/.github/workflows/release-main.yml
+++ b/.github/workflows/release-main.yml
@@ -7,19 +7,28 @@ on:
       - master
     types: [ published ]
 jobs:
+  set-platforms:
+    runs-on: ubuntu-latest
+    outputs:
+      platforms: ${{ steps.set-platforms.outputs.platforms }}
+    steps:
+      - name: Set platforms
+        id: set-platforms
+        run: echo "::set-output name=platforms::linux/amd64,linux/arm64/v8"
   check-source-branch:
-    uses: kbase/.github/.github/workflows/reusable_validate-branch.yml@main
+    uses: kbase/.github/.github/workflows/reusable_validate-branch.yml@multi-target
     with:
       build_branch: '${{ github.event.release.target_commitish }}'
   validate-release-tag:
     needs: check-source-branch
-    uses: kbase/.github/.github/workflows/reusable_validate-release-tag.yml@main
+    uses: kbase/.github/.github/workflows/reusable_validate-release-tag.yml@multi-target
     with:
       release_tag: '${{ github.event.release.tag_name }}'
   build-push:
     needs: validate-release-tag
-    uses: kbase/.github/.github/workflows/reusable_build-push.yml@main
+    uses: kbase/.github/.github/workflows/reusable_build-push.yml@multi-target
     with:
       name: '${{ github.event.repository.name }}'
       tags: '${{ github.event.release.tag_name }},latest'
+      platforms: ${{ needs.set-platforms.outputs.platforms }}
     secrets: inherit
diff --git a/Dockerfile b/Dockerfile
index 5ad3780..8a11b48 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,32 +1,27 @@
-FROM arangodb:3.5.3
+# Builder stage
+FROM alpine:latest as builder
 
-# Build arguments passed into the docker command for image metadata
-ARG BUILD_DATE
-ARG COMMIT
-ARG BRANCH
-
-# RUN pip install requests docker python-json-logger structlog && \
 RUN apk update && \
-    apk add p7zip && \
-    cd /tmp && \
-    wget https://downloads.rclone.org/rclone-current-linux-amd64.zip && \
-    unzip rclone-current-linux-amd64.zip && \
-    mv rclone-v*-linux-amd64/rclone /bin/rclone && \
-    mkdir -p /root/.config/rclone/
+    apk add --no-cache curl p7zip rclone
+
+# Create config directory
+RUN mkdir -p /root/.config/rclone/
 
+# Copy necessary files
 COPY rclone.conf /root/.config/rclone/rclone.conf
 COPY app/ /app/
 
-LABEL org.label-schema.build-date=$BUILD_DATE \
-      org.label-schema.vcs-url="https://github.com/kbase/db_zip2cloud.git" \
-      org.label-schema.vcs-ref=$COMMIT \
-      org.label-schema.schema-version="1.0.0-rc1" \
-      us.kbase.vcs-branch=$BRANCH  \
-      maintainer="Steve Chan sychan@lbl.gov" \
-      org.opencontainers.image.source="https://github.com/kbase/db_zip2cloud"
+# Final stage
+FROM alpine:latest
 
-WORKDIR /app
+RUN apk update && \
+    apk add --no-cache curl p7zip
 
-ENTRYPOINT /app/zip2cloud
+# Copy necessary binaries and files from builder stage
+COPY --from=builder /usr/bin/rclone /usr/bin/rclone
+COPY --from=builder /root/.config/rclone/rclone.conf /root/.config/rclone/rclone.conf
+COPY --from=builder /app/ /app/
 
+WORKDIR /app
 
+ENTRYPOINT ["/app/zip2cloud"]
\ No newline at end of file
diff --git a/app/README.md b/app/README.md
new file mode 100644
index 0000000..6b2372a
--- /dev/null
+++ b/app/README.md
@@ -0,0 +1,45 @@
+
+## Zip2Cloud
+
+A robust zip & upload utility for sending archives to a remote location.
+
+### Features
+
+- Intelligently compares local & remote files with md5 sums
+- Only uploads _completed_ archives
+- Only deletes local files once they have been successfully uploaded
+- Allows keeping an arbitrary amount of zipped & unzipped backups locally for faster restore
+  - Script only zips & uploads files that are missing from the remote location
+
+[//]: # (- Allows mixing backup files with other data)
+
+[//]: # (  - Only zips folders under the `$DUMP_BASE` directory with a date-based name e.g. `2024-04-01`)
+
+[//]: # (- Notifies on completion or error via Slack)
+
+### Operation of `zip2cloud`
+
+1. Cleans up old zip files and backup dumps based on the retention period set in the environment variables.
+2. Retrieves the list of remote backups and their MD5 checksums from the remote S3 bucket.
+3. Checks database dumps for completion by looking for a `dump_complete.txt` file in the dump's top-level directory.
+4. Compresses new database dumps that do not have a corresponding MD5 file in the remote S3 bucket.
+5. Compares the MD5 checksums of local and remote files.
+  1. If a local file does not have a matching MD5 checksum in the remote S3 bucket, it is added to the upload list.
+6. If there's an MD5 mismatch between a local and a remote file, the script increments the filename of the local file and adds it to the upload list.
+7. Finally, it syncs all the files in the upload list to the remote S3 bucket using rclone.
+
+### Variables
+
+| Variable        | Description                                       | Default |
+|-----------------|---------------------------------------------------|---------|
+| `BUCKET`        | The bucket to store the backups                   |         |
+| `BUCKET_PATH`   | The path within the bucket to store the backups   |         |
+| `DUMP_BASE`     | The base directory for backup dumps               | `/dump` |
+| `DUMP_RETENTION`| The number of days to keep uncompressed backups locally |         |
+| `REMOTE`        | The remote location to sync backups to            |         |
+| `SECRET`        | The encryption key for 7zip                       |         |
+| `SLACK_CHANNEL` | The slack channel to send notifications to        |         |
+| `SLACK_WEBHOOK` | The webhook URL for slack notifications           |         |
+| `ZIP_BASE`      | The base filename, minus date, for the compressed backups |         |
+| `ZIP_DIR`       | The directory to store all compressed backups     | `/zip`  |
+| `ZIP_RETENTION` | The number of days to keep compressed backups locally |         |
\ No newline at end of file
diff --git a/app/zip2cloud b/app/zip2cloud
index 06df524..ad8c40c 100755
--- a/app/zip2cloud
+++ b/app/zip2cloud
@@ -1,25 +1,19 @@
 #!/bin/sh
 
-# Script to compress and encrypt mongodb backup directories and then sync them against a
-# cloud S3 bucket
-#
-# Depends on 7zip and rclone
-#
-# sychan@lbl.gov
-# 5/21/2021
+## Variables
+COMPRESSION_LEVEL=${COMPRESSION_LEVEL:-0} # Set to 0 if the db dumps are already compressed
+DELETE_DUMP=${DELETE_DUMP:-''}
+DUMP_BASE=${DUMP_BASE:-/dump/full_backup}
+DUMP_RETENTION=${DUMP_RETENTION:-3}
+REMOTE=${REMOTE:-remote:${BUCKET}/${BUCKETPATH}}
+SECRET=${SECRET:-`cat /run/secrets/encryption_key`}
+SLACK_CHANNEL=${SLACK_CHANNEL:-''}
+SLACK_WEBHOOK=${SLACK_WEBHOOK:-''}
+ZIP_BASE=${ZIP_BASE:-backup_full}
+ZIP_DIR=${ZIP_DIR:-/zip}
+ZIP_RETENTION=${ZIP_RETENTION:-4}
 
-# Directory containing db dumps to be archived/compressed/copied
-DUMP_BASE=/dump/
-
-# Directory to put the zipped backups
-ZIP_DIR=/zip/
-
-NOW=$(/bin/date +"%Y%m%d%H%M")
-
-# Name of the zip'ed db backup. The .7z extension wil be added by the 7zip program
-
-ZIP_BASE=backup_full_
-ZIP_NAME=${ZIP_BASE}${NOW}
+### Cleanup
 
 [ -r /run/secrets/encryption_key ] || { echo "Encryption key not readable in /run/secrets/encryption_key" ; exit 1; }
 [ -r /run/secrets/gcp_backup_creds ] || { echo "Google cloud service credentials not found in /run/secrets/gcp_back_creds" ; exit 1; }
@@ -27,22 +21,122 @@ ZIP_NAME=${ZIP_BASE}${NOW}
 [ -z "${BUCKETPATH}" ] && { echo "Path within S3 bucket not set in BUCKETPATH environment variable" ; exit 1; }
 [ -z "${DELETE_DUMP}" ] || echo "DELETE_DUMP set, will delete files/directories under /dump/ when done compressing"
 
-# This is the password used to generate the AES256 encryption key
-SECRET=`cat /run/secrets/encryption_key`
 
-# This is the Google Cloud Storage path, note that it depends on rclone being preconfigured
-# for "remote" using the runtime creds, check rclone config in /root/.config/rclone/rclone.conf
-REMOTE=remote:${BUCKET}/${BUCKETPATH}
+# Delete all old zip files, except the last N, as defined by $ZIP_RETENTION
+rm -rf ${ZIP_DIR}/tmp_md5
+ls -t ${ZIP_DIR}/*.7z 2>/dev/null | tail -n +${ZIP_RETENTION} | xargs -r rm -f
+ls -t ${ZIP_DIR}/*.md5 2>/dev/null | tail -n +${ZIP_RETENTION}  | xargs -r rm -f
+
+# Delete all old backup dumps, except the last N, as defined by $DUMP_RETENTION
+find ${DUMP_BASE} -type d -name "[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]" -print0 | xargs -0 ls -td | tail -n +${DUMP_RETENTION} | xargs -I {} rm -rf {}
+
+### End Cleanup
+
+
+# Get list of remote backups
+remote_files=$(rclone ls remote:${BUCKET}/${BUCKETPATH} | grep 7z | awk '{print $2}' | rev | cut -d. -f2- | rev)
+# Pull remote md5 sums for each remote backup into `tmp_md5` directory
+mkdir -p ${ZIP_DIR}/tmp_md5 && cd $_
+for file in $remote_files; do
+    rclone md5sum remote:${BUCKET}/${BUCKETPATH}/$file.7z | awk '{print $1}' > ${ZIP_DIR}/tmp_md5/$file.md5
+done
+
+
+# Get all exports from DUMP_BASE
+for DUMP_DIR in $(ls -d ${DUMP_BASE}/*/); do
+    # Check if the dump is complete
+    echo "Checking export for ${DUMP_DIR}"
+    if [ ! -f "${DUMP_DIR}/dump_complete.txt" ]; then
+        echo "dump_complete.txt not found in ${DUMP_DIR}, skipping"
+        continue
+    fi
+    # Remove trailing slash and get the base name of the directory
+    DIR_NAME=$(basename ${DUMP_DIR%/})
+    ZIP_NAME=${ZIP_DIR}/${ZIP_BASE}_${DIR_NAME}
+    echo $DIR_NAME
+    # Check if the corresponding md5 file exists, if not, zip it
+    if [ ! -f "${ZIP_DIR}/tmp_md5/${ZIP_BASE}_${DIR_NAME}.md5" ]; then
+      echo "No remote exists for ${DIR_NAME}, zipping"
+      /usr/bin/7z a -p${SECRET} ${ZIP_NAME}  -mx=${COMPRESSION_LEVEL} -mhe -t7z ${DUMP_DIR} || { echo "Could not zip ${DUMP_DIR} into ${ZIP_NAME}" ; exit 1; }
+    else
+      echo "Remote exists for ${DIR_NAME}, skipping"
+    fi
+done
+
+# Compare checksums of local 7z files against all remotes' md5's. Add to upload list if not found
+uploads=""
+cd ${ZIP_DIR} || exit
+for file in ${ZIP_DIR}/*.7z; do
+    # Get the base name of the file without extension
+    base_name=$(basename "$file" .7z)
+    local_md5=$(md5sum "$file" | awk '{print $1}')
+    echo $local_md5 > "${ZIP_DIR}/${base_name}.md5"
+    # Now compare this file with the remote md5s
+    match_found=0
+    for remote_md5_file in ${ZIP_DIR}/tmp_md5/*.md5; do
+        remote_md5=$(cat "$remote_md5_file")
+        if [ "$local_md5" = "$remote_md5" ]; then
+            match_found=1
+            break
+        fi
+    done
+    if [ $match_found -eq 0 ]; then
+        echo "Adding $file to uploads list"
+        uploads="$uploads $file"
+    fi
+done
+
+echo "Current uploads candidates are: $uploads"
+
+## Verify & update list of files to upload
+final_uploads=""
+cd ${ZIP_DIR} || exit
+for file in ${uploads}; do
+    # Get the base name of the file without extension
+    base_name=$(basename "$file" .7z)
+      # Compare local and remote md5
+       remote_md5=$(cat "${ZIP_DIR}/tmp_md5/${base_name}.md5")
+       local_md5=$(cat "${ZIP_DIR}/${base_name}.md5")
+       if [ "$local_md5" != "$remote_md5" ]; then
+           echo "MD5 mismatch for file $file. Incrementing filename and adding to uploads list."
+           # Extract the last character of the base name
+           last_char=${base_name: -1}
+           # Check if the last character is a letter
+           if [[ $last_char =~ [a-y] ]]; then
+               # If it's a letter, increment it
+               next_char=$(echo "$last_char" | tr "a-y" "b-z")
+               new_base_name=${base_name%?}$next_char
+           elif [[ $last_char == 'z' ]]; then
+               # If it's 'z', replace it with 'a' and append 'a'
+               new_base_name=${base_name%?}aa
+           else
+               # If it's not a letter, append 'a'
+               new_base_name=${base_name}a
+           fi
+           # Rename the file
+           mv "$file" "${ZIP_DIR}/${new_base_name}.7z"
+           # Add the renamed file to the uploads list
+           final_uploads="$final_uploads ${ZIP_DIR}/${new_base_name}.7z"
+        fi
+done
+
+echo "Final uploads: $final_uploads"
+
 
-# Delete any files older than 30 days in the zip directory
-echo "Deleting database archives older than 30 days"
-/usr/bin/find ${ZIP_DIR} -mtime +30 -type f -name "${ZIP_BASE}*" -print -exec rm {} \;
+# Before running rclone
+#for file in "${uploads[@]}"; do
+for file in ${final_uploads}; do
+    ls $file
+    if [ ! -f "$file" ]; then
+        echo "File does not exist: $file"
+    fi
+done
 
-echo "Zipping ${DUMP_BASE}/${DUMP_DIR} to ${ZIP_DIR}/${ZIP_NAME}"
-cd /
-/usr/bin/7za a -p${SECRET} ${ZIP_DIR}/${ZIP_NAME}  -mx=7 -mhe -t7z ${DUMP_BASE} || { echo "Could not zip ${DUMP_BASE} into ${ZIP_DIR}/${ZIP_NAME}" ; exit 1; }
-[ -z "${DELETE_DUMP}" ] || { echo "Clearing contents of /dump/"; cd /dump/; rm -rf *; }
 
-echo "RClone-ing ${ZIP_DIR} to GCP ${GCP_DEST}"
-/bin/rclone sync ${ZIP_DIR}/ ${REMOTE}
 
+## Sync All Resulting Files (in list!)
+cd ${ZIP_DIR} || exit
+for file in ${final_uploads}; do
+    echo "RClone-ing ${file} to GCP ${REMOTE}"
+    /usr/bin/rclone sync -v "$file" ${REMOTE}/
+done