Update entrypoint.sh

entrypoint.sh

@@ -1,8 +1,9 @@
 #!/bin/sh
 
-# Create a new user if the USER_ID environment variable is set
-if [ -n "$USER_ID" ]; then
-  useradd -m -u "$USER_ID" user
+# Check if the user already exists
+if ! id user >/dev/null 2>&1; then
+  # Create a new user
+  useradd -m -u 1000 user
 fi
 
 # Switch to the user