Add Docker support and Gitea Actions workflow for container builds

.gitea/workflows/docker-build.yaml

@@ -0,0 +1,68 @@
+name: Build and Publish Mana Loop Docker Image
+
+on:
+  push:
+    branches:
+      - master
+      - main
+  workflow_dispatch:
+    inputs:
+      image_tag:
+        description: "Custom image tag (optional)"
+        required: false
+        default: ""
+
+jobs:
+  build-and-publish:
+    runs-on: ubuntu-latest
+    env:
+      IMAGE_HOST: gitea.tailf367e3.ts.net
+      IMAGE_OWNER: anexim
+      IMAGE_NAME: mana-loop
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Docker BuildX
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to Gitea Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.IMAGE_HOST }}
+          username: ${{ secrets.REGISTRY_USERNAME }}
+          password: ${{ secrets.REGISTRY_PASSWORD }}
+
+      - name: Extract metadata for Docker
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.IMAGE_HOST }}/${{ env.IMAGE_OWNER }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=ref,event=branch
+            type=sha,prefix=
+            type=raw,value=latest,enable={{is_default_branch}}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: true
+          tags: |
+            ${{ env.IMAGE_HOST }}/${{ env.IMAGE_OWNER }}/${{ env.IMAGE_NAME }}:latest
+            ${{ github.event.inputs.image_tag != '' && format('{0}/{1}/{2}:{3}', env.IMAGE_HOST, env.IMAGE_OWNER, env.IMAGE_NAME, github.event.inputs.image_tag) || '' }}
+            ${{ env.IMAGE_HOST }}/${{ env.IMAGE_OWNER }}/${{ env.IMAGE_NAME }}:${{ github.sha }}
+          platforms: linux/amd64
+          file: Dockerfile
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+
+      - name: Image digest
+        run: |
+          echo "Successfully pushed image tags:"
+          echo "  - ${{ env.IMAGE_HOST }}/${{ env.IMAGE_OWNER }}/${{ env.IMAGE_NAME }}:latest"
+          echo "  - ${{ env.IMAGE_HOST }}/${{ env.IMAGE_OWNER }}/${{ env.IMAGE_NAME }}:${{ github.sha }}"
+          if [ -n "${{ github.event.inputs.image_tag }}" ]; then
+            echo "  - ${{ env.IMAGE_HOST }}/${{ env.IMAGE_OWNER }}/${{ env.IMAGE_NAME }}:${{ github.event.inputs.image_tag }}"
+          fi