Refactor backend deployment workflow to use environment variables for registry configuration and update deployment conditions to target dev branch

.forgejo/workflows/deploy-backend.yaml

@@ -9,6 +9,11 @@ on:
       - 'Backend/**'
   workflow_dispatch:
 
+env:
+  REGISTRY: ${{ vars.CONTAINER_REGISTRY }}
+  REGISTRY_USERNAME: ${{ vars.CONTAINER_REGISTRY_USERNAME }}
+  REGISTRY_PASSWORD: ${{ secrets.CONTAINER_REGISTRY_PASSWORD }}
+
 jobs:
   build:
     name: Build Backend Docker Image
@@ -20,27 +25,26 @@ jobs:
       - name: Login to Docker Registry
         uses: docker/login-action@v3
         with:
-          registry: ${{ vars.DOCKER_REGISTRY }}
-          username: ${{ secrets.DOCKER_USERNAME }}
-          password: ${{ secrets.DOCKER_PASSWORD }}
+          registry: ${{ env.REGISTRY }}
+          username: ${{ env.REGISTRY_USERNAME }}
+          password: ${{ env.REGISTRY_PASSWORD }}
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
         with:
           config-inline: |
-            [registry."${{ vars.DOCKER_REGISTRY }}"]
-              http = true
-              insecure = true
+            [registry."${{ env.REGISTRY }}"]
+              ca=["/etc/ssl/certs/ca-certificates.crt"]
 
       - name: Extract metadata
         id: meta
         uses: docker/metadata-action@v5
         with:
-          images: ${{ vars.DOCKER_REGISTRY }}/elearning-backend
+          images: ${{ env.REGISTRY }}/elearning-backend
           tags: |
             type=ref,event=branch
             type=sha,prefix=
-            type=raw,value=latest,enable=${{ github.ref == 'refs/heads/main' }}
+            type=raw,value=latest,enable=${{ github.ref == 'refs/heads/dev' }}
 
       - name: Build and push Docker image
         uses: docker/build-push-action@v5
@@ -57,7 +61,7 @@ jobs:
     name: Deploy Backend to Server
     runs-on: ubuntu-latest
     needs: build
-    if: github.ref == 'refs/heads/main' || github.ref == 'refs/heads/dev'
+    if: github.ref == 'refs/heads/dev'
     steps:
       - name: Remote Deploy
         uses: appleboy/ssh-action@v1.2.1