add workflow

.gitea/workflows/build.yml

@@ -0,0 +1,25 @@
+name: Build Docker images
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  push-image:
+    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:
+          registry: git.min.rip
+          username: ${{ gitea.repository_owner }}
+          password: ${{ secrets.REGISTRY_TOKEN }}
+      - name: Build and push
+        uses: docker/build-push-action@v4
+        with:
+          push: true
+          tags: git.min.rip/${{ gitea.repository }}:${{ gitea.ref_name }}