Add Docker build target and new dependencies.

Enhanced `project.json` to include a Docker build target configuration using `@nx-tools/nx-container`. Additionally, updated `package.json` and `pnpm-lock.yaml` files with new dependencies for project functionality and maintenance.

apps/backend/project.json

@@ -21,6 +21,24 @@
           "buildTarget": "backend:build:production"
         }
       }
+    },
+    "container": {
+      "executor": "@nx-tools/nx-container:build",
+      "dependsOn": ["build"],
+      "options": {
+        "engine": "docker",
+        "metadata": {
+          "images": ["backend"],
+          "load": true,
+          "tags": [
+            "type=schedule",
+            "type=ref,event=branch",
+            "type=ref,event=tag",
+            "type=ref,event=pr",
+            "type=sha,prefix=sha-"
+          ]
+        }
+      }
     }
   }
 }