chore: ensure user is set to 'node' in Dockerfile and devcontainer configuration

.devcontainer/Dockerfile

@@ -14,3 +14,5 @@ RUN corepack enable \
     && mkdir -p ${PNPM_HOME} ${PNPM_GLOBAL_BIN} \
     && chown -R node:node /home/node/.local \
     && su node -c "pnpm config set global-bin-dir ${PNPM_GLOBAL_BIN} && pnpm add --global nx@${NX_VERSION}"
+
+USER node

.devcontainer/devcontainer.json

@@ -17,6 +17,7 @@
   // "features": {},
 
   "remoteUser": "node",
+  "containerUser": "node",
   "updateRemoteUserUID": true,
   "overrideCommand": true,
   "init": true,