feat: docker support

Also removes old, unused Fly.io config

Author: adalinesimonian

.dockerignore

@@ -1,11 +1,16 @@
-config.toml
-heimdallr
-heimdallr.exe
-heimdallr.db
-.env
-Dockerfile
-.git
-.gitignore
-README.md
-LICENSE
-.dockerignore
+*
+!commands
+!components
+!config
+!globals
+!listeners
+!model
+!scheduled_tasks
+!task
+!utils
+!go.mod
+!go.sum
+!main.go
+!rm_commands.go
+!start.sh
+!litestream.yml

.github/workflows/build-image.yml

@@ -0,0 +1,47 @@
+# WARNING: The build tag uses github.run_number which is a unique counter for
+# this workflow. Renaming, moving, or deleting this workflow file will reset the
+# run number. Please do not change the workflow filename or its identity without
+# coordinating with the team, as a reset can cause previously higher build
+# numbers to be replaced with lower ones.
+
+name: Build and Push Docker Image to GHCR
+
+on:
+  push:
+    branches:
+      - main
+
+concurrency:
+  group: build-and-push
+  cancel-in-progress: false
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to GitHub Container Registry
+        run: echo ${{ secrets.GITHUB_TOKEN }} | docker login ghcr.io -u ${{ github.actor }} --password-stdin
+
+      - name: Build and push image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: true
+          tags: |
+            ghcr.io/nllcommunity/heimdallr:${{ github.sha }}
+            ghcr.io/nllcommunity/heimdallr:${{ github.run_number }}
+            ghcr.io/nllcommunity/heimdallr:latest
+          labels: |
+            org.opencontainers.image.created=${{ github.event.head_commit.timestamp }}
+            org.opencontainers.image.revision=${{ github.sha }}

.github/workflows/deploy_prod.yml

@@ -12,5 +12,6 @@
   },
   "[markdown]": {
     "editor.rulers": []
-  }
+  },
+  "go.formatTool": "goimports"
 }

.vscode/settings.json

@@ -0,0 +1,28 @@
+FROM golang:1.24 AS builder
+
+WORKDIR /usr/src/app
+
+COPY go.mod go.sum ./
+
+RUN go mod download
+
+COPY . .
+
+RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -ldflags "-s -w" -o heimdallr .
+
+FROM alpine:3.21
+
+WORKDIR /usr/src/app
+
+RUN mkdir -p /var/lib/heimdallr
+ENV HEIMDALLR_BOT_DB=/var/lib/heimdallr/heimdallr.db
+VOLUME /var/lib/heimdallr
+
+RUN apk add --no-cache ca-certificates fuse3 sqlite tini
+
+COPY --from=litestream/litestream:0.3 /usr/local/bin/litestream /bin/litestream
+COPY --from=builder /usr/src/app/heimdallr /usr/src/app/bin/heimdallr
+COPY --from=builder /usr/src/app/litestream.yml /usr/src/app/start.sh ./
+
+ENTRYPOINT ["/sbin/tini", "--"]
+CMD ["./start.sh"]

Dockerfile

@@ -1,18 +1,23 @@
-#!/bin/bash
+#!/bin/sh
 
 START_COMMAND=./bin/heimdallr
 
 set -e
 set -u
-set -x
+
+# If DB_REPLICA_URL is not set, start without replication
+if [ -z "${DB_REPLICA_URL:-}" ]; then
+  echo "Starting without replication"
+  exec "${START_COMMAND}"
+fi
 
 litestream version
-echo "DB_REPLICA_URL=${DB_REPLICA_URL}"
+echo "DB_REPLICA_URL=${DB_REPLICA_URL:-}"
 
-readonly DB_PATH='heimdallr.db'
+readonly DB_PATH="${HEIMDALLR_BOT_DB:-heimdallr.db}"
 export DB_PATH
 
-if [[ -f "$DB_PATH" ]]; then
+if [ -f "$DB_PATH" ]; then
   echo "Existing database is $(stat -c %s "${DB_PATH}") bytes"
 else
   echo "Restoring database from replica"