Adjust entrypoint script to move env file instead of removing

Author: rjhenry

docker-entrypoint.sh

@@ -19,7 +19,11 @@ IFS=":" read -r DB_HOST_NAME DB_PORT <<< "$DB_HOST"
 DB_PORT=${DB_PORT:-3306}
 
 # Ensure these is no local .env file
-[ -f ".env" ] && rm .env
+if [ -f ".env" ]; then
+  mv .env .env.bak
+  echoerr ".env file detected - moved to .env.bak"
+  echoerr "Please update your configuration to use environment variables in the container!"
+fi
 
 # Check a number of essential variables are set
 check_vars_exist \