ci: GitHub Actions workflow for Docker Hub auto-publish on version tags

Author: Cihad Kocasahan

.github/workflows/docker-publish.yml

@@ -0,0 +1,37 @@
+name: Build & Publish to Docker Hub
+
+on:
+  push:
+    tags:
+      - "v*"   # Trigger on version tags: v0.1.0, v1.0.0, etc.
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Extract version tag
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ secrets.DOCKERHUB_USERNAME }}/shadow-svn
+          tags: |
+            type=semver,pattern={{version}}
+            type=raw,value=latest
+
+      - name: Build and push image
+        uses: docker/build-push-action@v5
+        with:
+          context: ./app
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

docker-compose.yml

@@ -21,7 +21,10 @@ services:
       - shadow-sync-net
 
   sync-engine:
-    build: 
+    # Option A - Pull from Docker Hub (recommended for end users):
+    # image: cihadkocasahan/shadow-svn:latest
+    # Option B - Build from source (default, for development):
+    build:
       context: ./app
       dockerfile: Dockerfile
     container_name: Shadow-Sync-Engine