Configure insecure HTTP registry for Docker Buildx in frontend deployment workflows and update backend registry configuration

.forgejo/workflows/deploy-backend.yaml

@@ -29,7 +29,8 @@ jobs:
         with:
           config-inline: |
             [registry."${{ vars.DOCKER_REGISTRY }}"]
-              ca=["/etc/ssl/certs/ca-certificates.crt"]
+              http = true
+              insecure = true
 
       - name: Extract metadata
         id: meta

.forgejo/workflows/deploy-frontend-learner.yaml

@@ -19,6 +19,11 @@ jobs:
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
+        with:
+          config-inline: |
+            [registry."${{ vars.DOCKER_REGISTRY }}"]
+              http = true
+              insecure = true
 
       - name: Login to Docker Registry
         uses: docker/login-action@v3

.forgejo/workflows/deploy-frontend-management.yaml

@@ -19,6 +19,11 @@ jobs:
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
+        with:
+          config-inline: |
+            [registry."${{ vars.DOCKER_REGISTRY }}"]
+              http = true
+              insecure = true
 
       - name: Login to Docker Registry
         uses: docker/login-action@v3