still trying to fix the " fatal: The GID `1000' is already in use" error

docker-entrypoint.sh

@@ -15,12 +15,13 @@ if ! id "$DOCKER_USER" >/dev/null 2>&1; then
     if getent group $GROUP_ID >/dev/null 2>&1; then
         EXISTING_GROUP=$(getent group $GROUP_ID | cut -d: -f1)
         echo "GID $GROUP_ID is already in use by group $EXISTING_GROUP. Using this group."
+        DOCKER_GROUP=$EXISTING_GROUP
     else
         addgroup --gid $GROUP_ID $DOCKER_GROUP
         echo "Created group $DOCKER_GROUP with GID $GROUP_ID."
     fi
 
-    # Create user with the specified UID and existing or new group
+    # Create user with the specified UID and associated group
     adduser --shell /bin/sh --uid $USER_ID --ingroup $DOCKER_GROUP --disabled-password --gecos "" $DOCKER_USER
 
     # Set ownership and permissions