ci: migrate to GitHub actions

.github/workflows/build.yml

@@ -0,0 +1,57 @@
+name: build
+on:
+  push:
+    branches:
+    - master
+    - v*
+    tags:
+    - v*
+  pull_request:
+jobs:
+  build_push_image:
+    name: Build and push image
+    runs-on: ubuntu-latest
+    if: ${{ startsWith(github.ref, 'refs/heads/') || startsWith(github.ref, 'refs/tags/') }}
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+
+    # For multi-platform support
+    - name: Set up QEMU
+      uses: docker/setup-qemu-action@v3
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v3
+
+    - name: Declare branch
+      run: |
+        echo "sha_short=$(git rev-parse --short "$GITHUB_SHA")" >> "$GITHUB_ENV"
+        echo "branch=${GITHUB_HEAD_REF:-${GITHUB_REF#refs/heads/}}" >> "$GITHUB_ENV"
+
+    - name: Login to Docker Hub
+      uses: docker/login-action@v3
+      with:
+        username: ${{ secrets.DOCKER_USERNAME }}
+        password: ${{ secrets.DOCKER_PASSWORD }}
+
+    # longhornio/longhorn-ui image
+    - name: docker-publish
+      if: ${{ startsWith(github.ref, 'refs/heads/') }}
+      uses: docker/build-push-action@v5
+      with:
+        push: true
+        platforms: linux/amd64,linux/arm64
+        tags: longhornio/longhorn-ui:${{ env.branch }}-head
+        file: Dockerfile
+        build-args: |
+          VERSION=${{ env.sha_short }}
+
+    - name: docker-publish-with-tag
+      if: ${{ startsWith(github.ref, 'refs/tags/') }}
+      uses: docker/build-push-action@v5
+      with:
+        push: true
+        platforms: linux/amd64,linux/arm64
+        tags: longhornio/longhorn-ui:${{ github.ref_name }}
+        file: Dockerfile
+        build-args: |
+          VERSION=${{ github.ref_name }}