building image actions is triggered only if a pull request has been merged into main

.gitea/workflows/build_image.yaml

@@ -1,8 +1,9 @@
 name: Build and Push Docker Image
 
 on:
-  push:
-    branches: [ "ci-cd" ]
+  pull_request:
+    types: [closed]
+    branches: [ main ]
 
 env:
   REGISTRY: git.vmn.su
@@ -11,6 +12,7 @@ env:
 
 jobs:
   build-and-push-backend:
+    if: github.event.pull_request.merged == true
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
@@ -32,6 +34,7 @@ jobs:
 
 
   build-and-push-frontend:
+    if: github.event.pull_request.merged == true
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
@@ -53,6 +56,7 @@ jobs:
 
 
   notify-deployment-server:
+    if: github.event.pull_request.merged == true
     runs-on: ubuntu-latest
     steps:
       - name: Trigger the webhook on the deployment server to start pulling the images