ci: Add GHCR publish workflow for Docker images

Author: TamTunnel

AIGovHub/.github/workflows/publish-ghcr.yml

@@ -0,0 +1,69 @@
+name: Publish to GHCR
+
+on:
+  push:
+    branches: [main]
+    tags:
+      - 'v*'
+  workflow_dispatch:
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME_BACKEND: ${{ github.repository }}/backend
+  IMAGE_NAME_FRONTEND: ${{ github.repository }}/frontend
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Log in to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata for Backend
+        id: meta-backend
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME_BACKEND }}
+          tags: |
+            type=ref,event=branch
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=sha
+
+      - name: Build and push Backend image
+        uses: docker/build-push-action@v5
+        with:
+          context: ./AIGovHub/backend
+          push: true
+          tags: ${{ steps.meta-backend.outputs.tags }}
+          labels: ${{ steps.meta-backend.outputs.labels }}
+
+      - name: Extract metadata for Frontend
+        id: meta-frontend
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME_FRONTEND }}
+          tags: |
+            type=ref,event=branch
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=sha
+
+      - name: Build and push Frontend image
+        uses: docker/build-push-action@v5
+        with:
+          context: ./AIGovHub/frontend
+          push: true
+          tags: ${{ steps.meta-frontend.outputs.tags }}
+          labels: ${{ steps.meta-frontend.outputs.labels }}