Align root/vscode user dynamic for codespaces with non-codespaces config (#30593)

.devcontainer/Dockerfile

@@ -5,7 +5,7 @@ FROM mcr.microsoft.com/devcontainers/ruby:1-3.3-bookworm
 # RUN gem install rails webdrivers
 
 ARG NODE_VERSION="20"
-RUN su vscode -c "source /usr/local/share/nvm/nvm.sh && nvm install ${NODE_VERSION} 2>&1"
+RUN . /usr/local/share/nvm/nvm.sh && nvm install ${NODE_VERSION} 2>&1
 
 # [Optional] Uncomment this section to install additional OS packages.
 RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
@@ -15,6 +15,6 @@ RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
 RUN gem install foreman
 
 # [Optional] Uncomment this line to install global node packages.
-RUN su vscode -c "source /usr/local/share/nvm/nvm.sh && corepack enable" 2>&1
+RUN . /usr/local/share/nvm/nvm.sh && corepack enable 2>&1
 
 COPY welcome-message.txt /usr/local/etc/vscode-dev-containers/first-run-notice.txt

.devcontainer/codespaces/devcontainer.json

@@ -23,6 +23,8 @@
     }
   },
 
+  "remoteUser": "root",
+
   "otherPortsAttributes": {
     "onAutoForward": "silent"
   },