general: move Docker image build to GitHub Actions

.github/workflows/docker-develop.yaml

@@ -0,0 +1,38 @@
+on:
+  push:
+    branches:
+      - '**'
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Build frontend docker image
+        uses: docker/build-push-action@v4
+        with:
+          context: '{{defaultContext}}:frontend'
+          push: true
+          tags: |
+            xddxdd/bird-lg-go:develop
+            xddxdd/bird-lg-go:develop-${{ github.sha }}
+
+      - name: Build proxy docker image
+        uses: docker/build-push-action@v4
+        with:
+          context: '{{defaultContext}}:proxy'
+          push: true
+          tags: |
+            xddxdd/bird-lgproxy-go:develop
+            xddxdd/bird-lgproxy-go:develop-${{ github.sha }}