Phoenix enable GZIP compression

In lib/myapp_web/endpoint.ex change [[GZIP]] from false to true:

 plug(Plug.Static, at: "/", from: :tilex, gzip: true, only: ~w(assets ...))

But why stop there? We can [[compress]] our dynamic document bodies just as easily. In config/prod.exs, add compress: true to the [[HTTP]] config of the [[endpoint]].

config :my_app, MyAppWeb.Endpoint,
  http: [port: {:system, "PORT"}, compress: true]

Once done, you can validate that there is a content-encoding: gzip [[HTTP headers]] in the [[HTTP Response]].