Add SQL to add/drop index to/from medias.file_path

migrations/postgres/2021-02-23-153402_medias_index_file_path/down.sql

@@ -1 +1 @@
--- This file should undo anything in `up.sql`
+DROP INDEX medias_index_file_path;

migrations/postgres/2021-02-23-153402_medias_index_file_path/up.sql

@@ -1 +1 @@
--- Your SQL goes here
+CREATE INDEX medias_index_file_path ON medias (file_path);