Add basic workflow to build litlytics docker images

Author: yamalight

.github/workflows/docker-image.yml

@@ -0,0 +1,66 @@
+name: Docker Images
+
+on:
+  push:
+    branches: ['main']
+  release:
+    types: [created]
+
+env:
+  # Use docker.io for Docker Hub if empty
+  REGISTRY: ghcr.io
+  # github.repository as <account>/<repo>
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+      id-token: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      # Login against a Docker registry
+      # https://github.com/docker/login-action
+      - name: Log into registry ${{ env.REGISTRY }}
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      # Extract metadata (tags, labels) for Docker
+      # https://github.com/docker/metadata-action
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+      # Conditional tagging based on the event type (main push or release)
+      - name: Determine image tags
+        id: tags
+        run: |
+          if [[ "${{ github.event_name }}" == "release" ]]; then
+            # Tag as `latest` and `vX.X.X` for releases
+            echo "TAGS=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest,${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:v${{ github.event.release.tag_name }}" >> $GITHUB_ENV
+          else
+            # Tag as `nightly` for pushes to main
+            echo "TAGS=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:nightly" >> $GITHUB_ENV
+        shell: bash
+
+      # Build and push Docker image with Buildx
+      # https://github.com/docker/build-push-action
+      - name: Build and push Docker image
+        id: build-and-push
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          tags: ${{ env.TAGS }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max