added workflow in gitea

.gitea/workflows/publish.yaml

@@ -0,0 +1,21 @@
+name: Docker Build
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  build:
+    runs-on: self-hosted
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Build Docker image
+        run: |
+          docker build -t myapp:latest .
+
+      - name: List Docker images
+        run: docker images