ci: add build and push pipeline

.gitea/workflows/ci.yml

@@ -0,0 +1,27 @@
+name: Build and Push BuildUp
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Login to Harbor
+        uses: docker/login-action@v3
+        with:
+          registry: harbor.reveal07.evoliatis.eu
+          username: admin
+          password: ${{ secrets.HARBOR_PASSWORD }}
+
+      - name: Build and Push
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          push: true
+          tags: harbor.reveal07.evoliatis.eu/buildup/buildup:latest