Fix automatic remote user id, base image test

Author: shokkunrf

images/base/.devcontainer/devcontainer.json

@@ -7,8 +7,6 @@
     "ghcr.io/devcontainers/features/common-utils:2": {
       "installZsh": "false",
       "username": "developer",
-      "userUid": "1000",
-      "userGid": "1000",
       "upgradePackages": "true"
     },
     "ghcr.io/devcontainers/features/git:1": {

images/base/README.md

@@ -14,7 +14,7 @@ Base devcontainer image with common tools.
 
 | Tool | Source |
 | --- | --- |
-| common-utils (`developer` user, UID/GID 1000) | [devcontainers/features/common-utils](https://github.com/devcontainers/features/tree/main/src/common-utils) |
+| common-utils (`developer` user) | [devcontainers/features/common-utils](https://github.com/devcontainers/features/tree/main/src/common-utils) |
 | git | [devcontainers/features/git](https://github.com/devcontainers/features/tree/main/src/git) |
 | Node.js 24 + npm | [devcontainers/features/node](https://github.com/devcontainers/features/tree/main/src/node) |
 | prettier | [prettier](https://www.npmjs.com/package/prettier) |

images/base/test-project/test.sh

@@ -3,10 +3,8 @@ cd "$(dirname "$0")"
 
 . ./test-utils.sh developer
 
-# User checks
-check "non-root-user" id ${USERNAME}
-check "uid" test "$(id -u ${USERNAME})" = "1000"
-check "gid" test "$(id -g ${USERNAME})" = "1000"
+# User check
+check "remote-user" test "$(whoami)" = "${USERNAME}"
 
 # Tool checks
 check "git" git --version