Adding the configuration for gitea

.gitea/workflows/docker-build.yml

@@ -0,0 +1,30 @@
+name: Build and Push Docker Image
+
+on:
+  schedule:
+    - cron: '0 0 1 * *'
+  push:
+    branches:
+      - main
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_TOKEN }}
+
+      - name: Build the Docker image
+        id: build
+        run: |
+          docker build . -t k2patel/postfix:latest
+      
+      - name: Push the Docker image
+        run: docker push k2patel/postfix:latest