install golang in the devcontainer

Author: jordanstephens

.devcontainer/devcontainer.json

@@ -5,7 +5,10 @@
   },
   "features": {
     "ghcr.io/defanglabs/devcontainer-feature/defang-cli:1.0.4": {},
-    "ghcr.io/devcontainers/features/docker-in-docker:2": {}
+    "ghcr.io/devcontainers/features/docker-in-docker:2": {},
+    "ghcr.io/devcontainers/features/go:1": {
+      "version": "1.23"
+    }
   },
   "mounts": [
     // "source=/Users/user/.aws,target=/home/vscode/.aws,type=bind,consistency=cached",