Add Gitea Actions workflow for building and pushing Docker image

.gitea/workflows/build-and-push.yaml

@@ -0,0 +1,36 @@
+name: Build and Push to Harbor
+
+on:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to Harbor
+        uses: docker/login-action@v3
+        with:
+          registry: images.caffeinetux.com
+          username: admin
+          password: ${{ secrets.HARBOR_PASSWORD }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v5
+        with:
+          context: ./htlm
+          platforms: linux/amd64,linux/arm64,linux/arm/v7
+          push: true
+          tags: |
+            images.caffeinetux.com/apps/neon-vortex:latest
+            images.caffeinetux.com/apps/neon-vortex:${{ github.sha }}
+          cache-from: type=registry,ref=images.caffeinetux.com/apps/neon-vortex:buildcache
+          cache-to: type=registry,ref=images.caffeinetux.com/apps/neon-vortex:buildcache,mode=max