use host and port variables

config/config.exs

@@ -12,13 +12,14 @@ config :cannery,
 
 # Configures the endpoint
 config :cannery, CanneryWeb.Endpoint,
-  url: [host: "localhost"],
+  url: [host: System.get_env("HOST") || "localhost"],
+  http: [port: String.to_integer(System.get_env("PORT") || "80")],
   secret_key_base: "KH59P0iZixX5gP/u+zkxxG8vAAj6vgt0YqnwEB5JP5K+E567SsqkCz69uWShjE7I",
   render_errors: [view: CanneryWeb.ErrorView, accepts: ~w(html json), layout: false],
   pubsub_server: Cannery.PubSub,
   live_view: [signing_salt: "zOLgd3lr"],
   registration: System.get_env("REGISTRATION") || "invite"
-  
+
 config :cannery, :generators,
   migration: true,
   binary_id: true,

config/dev.exs

@@ -14,7 +14,6 @@ config :cannery, Cannery.Repo,
 # watchers to your application. For example, we use it
 # with webpack to recompile .js and .css sources.
 config :cannery, CanneryWeb.Endpoint,
-  http: [port: 4000],
   debug_errors: true,
   code_reloader: true,
   check_origin: false,

config/prod.exs

@@ -10,8 +10,6 @@ import Config
 # which you should run after static files are built and
 # before starting your production server.
 config :cannery, CanneryWeb.Endpoint,
-  url: [host: "localhost"],
-  http: [port: 4000],
   cache_static_manifest: "priv/static/cache_manifest.json"
 
 config :cannery, Cannery.Repo,

config/releases.exs

@@ -20,9 +20,12 @@ secret_key_base =
     You can generate one by calling: mix phx.gen.secret
     """
 
+host = System.get_env("HOST") || "localhost"
+
 config :cannery, CanneryWeb.Endpoint,
+  url: [host: host],
   http: [
-    port: String.to_integer(System.get_env("PORT") || "4000"),
+    port: String.to_integer(System.get_env("PORT") || "80"),
     transport_options: [socket_opts: [:inet6]]
   ],
   secret_key_base: secret_key_base,