ci: add GitHub action to build Docker image

Author: enxg

.github/workflows/build-and-push-docker.yml

@@ -0,0 +1,31 @@
+name: Build and Push Docker Image
+on:
+    push:
+        branches:
+        - main
+    workflow_dispatch: {}
+jobs:
+    build-and-push:
+        runs-on: ubuntu-latest
+        steps:
+          - name: Login to GitHub Container Registry
+            uses: docker/login-action@v3
+            with:
+              registry: ghcr.io
+              username: ${{ github.actor }}
+              password: ${{ secrets.GITHUB_TOKEN }}
+          - name: Login to DockerHub
+            uses: docker/login-action@v3
+            with:
+              username: ${{ secrets.DOCKERHUB_USERNAME }}
+              password: ${{ secrets.DOCKERHUB_TOKEN }}
+          - name: Set up QEMU
+            uses: docker/setup-qemu-action@v3
+          - name: Set up Docker Buildx
+            uses: docker/setup-buildx-action@v3
+          - name: Build and push
+            uses: docker/build-push-action@v6
+            with:
+              push: true
+              tags: ghcr.io/enxg/skyticket:latest
+              platforms: linux/amd64,linux/arm64