Delete Unnecessary Environment Variables

config/docker.env

@@ -4,6 +4,4 @@ DATABASE_USER=postgres
 DATABASE_HOST=db
 DATABASE_URL=ecto://postgres:postgres@db/postgres
 PORT=4000
-HOSTNAME=localhost
-POSTGRES_PASSWORD=postgres
-LANG=en_US.UTF-8s
\ No newline at end of file
+# PROXY="http://sample.com:8080"
\ No newline at end of file