add docker build action

.github/workflows/build-docker-package.yml

@@ -0,0 +1,43 @@
+name: Build Docker Package
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [main]
+  release:
+    types: [published]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Log in to Gitea Container Registry
+        uses: docker/login-action@v2
+        with:
+          registry: git.ewenlau.net
+          username: ${{ secrets.GIT_USERNAME }}
+          password: ${{ secrets.GIT_PASSWORD }}
+
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@v4
+        with:
+          images: git.ewenlau.net/${{ secrets.GIT_USERNAME }}/tg-dev-srv-bot
+          tags: |
+            type=raw,value=dev,enable=${{ github.event_name == 'push' }}
+            type=semver,pattern={{version}},enable=${{ github.event_name == 'release' }}
+            type=raw,value=latest,enable=${{ github.event_name == 'release' }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v4
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}