diff --git a/entrypoint.sh b/entrypoint.sh
index 9b73c6b..661b68b 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -4,9 +4,9 @@ echo 'Entrypoint script'
 cd /usr/src/app
 
 # blank config, use defaults
-cat <<EOF > config.json
+test -e config.json || cat <<EOF > config.json
 {
 }
 EOF
 
-node dist/src/index.js
\ No newline at end of file
+node dist/src/index.js