Add caching option for Docker images

backend/.env

@@ -1,7 +0,0 @@
-# Environment variables declared in this file are automatically made available to Prisma.
-# See the documentation for more detail: https://pris.ly/d/prisma-schema#using-environment-variables
-
-# Prisma supports the native connection string format for PostgreSQL, MySQL and SQLite.
-# See the documentation for all the connection string options: https://pris.ly/d/connection-strings
-
-DATABASE_URL="postgresql://johndoe:randompassword@localhost:5432/mydb?schema=public"