added pg_trgm for postgres

entrypoint.sh

@@ -85,6 +85,9 @@ postgresql_init() {
   fi
 
   psql -h$DB_HOST -p $DB_PORT -U$DB_ROOT_USER -tc "GRANT ALL PRIVILEGES ON DATABASE $DB_DATABASE to $DB_USER;" > /dev/null
+
+  # TODO make this configurable
+  psql -h$DB_HOST -p $DB_PORT -U$DB_ROOT_USER -tc "CREATE EXTENSION pg_trgm;" > /dev/null 2> /dev/null
 }