Added automatic image build & pushing on commits involving key files …

…to the dev tag.

Also cleaned up other GitHub Action workflows

.github/workflows/discord-release-bot.yml

@@ -1,3 +1,6 @@
+name: Post New Release Notes to Discord
+# Automatically posts new Release Notes to the project's discord
+
 on:
   release:
     types:
@@ -14,4 +17,4 @@ jobs:
         with:
           webhook_url: ${{ secrets.DISCORD_RELEASE_WEBHOOK_URL }}
           username: "CWA Release Changelog Bot"
-          avatar_url: "https://ibb.co/r0yFvZx"
+          avatar_url: "https://github.com/crocodilestick/Calibre-Web-Automated/blob/main/README_images/cwa-logo-round-light.png"

.github/workflows/dockerhub-build-push-on-push.yml

@@ -0,0 +1,46 @@
+name: Build and Push Image to DockerHub
+# Automatically builds and pushes a multi-platform dev image based on commits involving key files
+
+on:
+  push:
+    paths:
+      - 'empty_library/**'
+      - 'root/**'
+      - 'scripts/**'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: DockerHub Login
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_PA_TOKEN }}
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: ./Dockerfile
+          push: true
+          build-args: |
+            BUILD_DATE=${{ github.event.repository.updated_at }}
+            VERSION=${{ vars.CURRENT_DEV_VERSION }}-DEV_BUILD-${{ vars.CURRENT_DEV_BUILD_NUM }}
+          tags: |
+            ${{ secrets.DOCKERHUB_USERNAME }}/calibre-web-automated:dev
+          
+          platforms: linux/amd64,linux/arm64
+
+      - name: Increment dev build number
+        uses: action-pack/increment@v2
+        id: increment
+        with:
+          name: 'CURRENT_DEV_BUILD_NUM'
+          token: ${{ secrets.DEV_BUILD_NUM_INCREMENTOR_TOKEN }}

.github/workflows/dockerhub-description.yml

@@ -1,4 +1,6 @@
 name: Update Docker Hub Description
+# Automatically mirrors the README to the project's DockerHub page
+
 on:
   push:
     branches: