Set minimum npm version for consistency (#470)

* Set npm version  for consistency
* Add Claude local settings file to gitignore

---------

Signed-off-by: Dan Barr <6922515+danbarr@users.noreply.github.com>
Co-authored-by: Dan Barr <6922515+danbarr@users.noreply.github.com>

Author: danbarr

.devcontainer/devcontainer.json

@@ -11,7 +11,7 @@
   "mounts": [
     "source=${localWorkspaceFolderBasename}-node_modules,target=${containerWorkspaceFolder}/node_modules,type=volume"
   ],
-  "postCreateCommand": "sudo chown node:node node_modules",
+  "postCreateCommand": "sudo chown node:node node_modules && npm install -g npm@11",
   "containerEnv": {
     "CI": "true"
   },

.gitignore

@@ -23,3 +23,4 @@ yarn-debug.log*
 yarn-error.log*
 .vercel
 .idea
+.claude/settings.local.json

package-lock.json

@@ -67,6 +67,7 @@
     ]
   },
   "engines": {
-    "node": "24"
+    "node": "24",
+    "npm": "^11.7.0"
   }
 }