fix: refer to correct cloud SQL proxy script

entrypoint

@@ -5,7 +5,7 @@ set -o pipefail
 set -o nounset
 
 # run in the background and allow it some time to start before continuing
-/cloud_sql_proxy -verbose -structured_logs -dir=/cloudsql -instances=$INSTANCE_CONNECTION_NAME &
+/app/cloud_sql_proxy -verbose -structured_logs -dir=/cloudsql -instances=$INSTANCE_CONNECTION_NAME &
 sleep 10
 echo "Created Cloud SQL Proxy at $INSTANCE_CONNECTION_NAME, running in the background"
 
@@ -16,7 +16,7 @@ fi
 echo "Set/checked POSTGRES_USER..."
 
 # omit the port when running on App Engine, Cloud Run etc
-if [ -z "${INSTANCE_CONNECTION_NAME}"]; then
+if [ -z "${INSTANCE_CONNECTION_NAME}"]]; then
     export DATABASE_URL="postgres://${POSTGRES_USER}:${POSTGRES_PASSWORD}@${POSTGRES_HOST}:${POSTGRES_PORT}/${POSTGRES_DB}"
     echo "Set up database URL for running in Cloud SQL (Unix Socket)"
 else