Restructure code base

config/dev.exs

@@ -8,7 +8,7 @@ config :matrix_server, MatrixServer.Repo,
   username: "matrix_server",
   password: "matrix_server",
   database: "matrix_server_dev",
-  hostname: "localhost",
+  hostname: hostname,
   show_sensitive_data_on_connection_error: true,
   pool_size: 10
 

config/test.exs

@@ -1,5 +1,8 @@
 use Mix.Config
 
+hostname = "localhost"
+port = System.get_env("PORT") || 4000
+
 # Configure your database
 #
 # The MIX_TEST_PARTITION environment variable can be used
@@ -9,16 +12,17 @@ config :matrix_server, MatrixServer.Repo,
   username: "matrix_server",
   password: "matrix_server",
   database: "matrix_server_test#{System.get_env("MIX_TEST_PARTITION")}",
-  hostname: "localhost",
+  hostname: hostname,
   pool: Ecto.Adapters.SQL.Sandbox
 
 # We don't run a server during test. If one is required,
 # you can enable the server option below.
 config :matrix_server, MatrixServerWeb.Endpoint,
-  http: [port: 4002],
+  http: [port: port],
   server: false
 
 # Print only warnings and errors during test
 config :logger, level: :warn
 
-config :matrix_server, :server_name, "localhost"
+config :matrix_server, server_name: "#{hostname}:#{port}"
+config :matrix_server, private_key_file: "keys/id_ed25519"