add ups workflow and config

Signed-off-by: ngn <ngn@ngn.tf>

.gitea/workflows/docker.yml

@@ -0,0 +1,34 @@
+name: docker
+
+on:
+  push:
+    branches:
+      - "main"
+    paths-ignore:
+      - "README.md"
+      - "LICENSE.txt"
+      - "docker-compose.example.yml"
+      - "ups.json"
+
+env:
+  REGISTRY: git.ngn.tf
+  IMAGE: ${{gitea.repository}}
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Login to container repo
+        uses: docker/login-action@v1
+        with:
+          registry: ${{env.REGISTRY}}
+          username: ${{gitea.actor}}
+          password: ${{secrets.PACKAGES_TOKEN}}
+
+      - name: Build docker image
+        run: |
+          docker build . --tag ${{env.REGISTRY}}/${{env.IMAGE}}:latest
+          docker push ${{env.REGISTRY}}/${{env.IMAGE}}:latest