remove storage dir env

.env.example

@@ -2,5 +2,4 @@ DATABASE_URL="mysql://root:root@localhost:3306/library"
 DB_USERNAME=""
 DB_PASSWORD=""
 CERT_DIR=""
-STORAGE_DIR=""
 BASE_URL=""

src/plugins/static.ts

@@ -1,10 +1,8 @@
 import fp from 'fastify-plugin';
 import { fastifyStatic } from '@fastify/static';
-import path from 'path';
 
 export default fp(async (fastify) => {
-  const __dirname = process.env.STORAGE_DIR as string
   fastify.register(fastifyStatic, {
-    root: path.join(__dirname, '/storage'),
+    root: '/app/storage',
   });
 });