update env example

remove test endpoint

.env.example

@@ -1,15 +1,14 @@
-DATABASE_URL='mysql://root@127.0.0.1:3306/flashcards'
+DATABASE_URL=123
+DATABASE_URL_UNPOOLED=123
 ACCESS_JWT_SECRET_KEY=123
 REFRESH_JWT_SECRET_KEY=123
-AWS_ACCESS_KEY=123
-AWS_SECRET_ACCESS_KEY=123
-AWS_REGION=123
 AWS_SES_SMTP_HOST=123
 AWS_SES_SMTP_PORT=123
 AWS_SES_SMTP_USER=123
 AWS_SES_SMTP_PASS=123
-AWS_BUCKET_NAME=123
 AWS_S3_ACCESS_KEY=123
 AWS_S3_SECRET_ACCESS_KEY=123
 ADMIN_LOGIN=123
-ADMIN_PASSWORD=123
+ADMIN_PASSWORD=123
+STORAGE_SERVICE_URL=123
+STORAGE_SERVICE_TOKEN=123