[Bugfix] Fix basic auth in deployed apps (#52)

* Renamed auth env vars and updated them to work in prod env

* Updated basic auth parsing to ignore empty strings

config/config.exs

@@ -17,10 +17,10 @@ config :pinchflat,
   # The user may or may not store metadata for their needs, but the app will always store its copy
   metadata_directory: "/config/metadata",
   tmpfile_directory: Path.join([System.tmp_dir!(), "pinchflat", "data"]),
-  # Setting AUTH_USERNAME and AUTH_PASSWORD implies you want to use basic auth.
+  # Setting BASIC_AUTH_USERNAME and BASIC_AUTH_PASSWORD implies you want to use basic auth.
   # If either is unset, basic auth will not be used.
-  basic_auth_username: System.get_env("AUTH_USERNAME"),
-  basic_auth_password: System.get_env("AUTH_PASSWORD"),
+  basic_auth_username: System.get_env("BASIC_AUTH_USERNAME"),
+  basic_auth_password: System.get_env("BASIC_AUTH_PASSWORD"),
   file_watcher_poll_interval: 1000
 
 # Configures the endpoint

config/runtime.exs

@@ -21,6 +21,10 @@ if System.get_env("PHX_SERVER") do
   config :pinchflat, PinchflatWeb.Endpoint, server: true
 end
 
+config :pinchflat,
+  basic_auth_username: System.get_env("BASIC_AUTH_USERNAME"),
+  basic_auth_password: System.get_env("BASIC_AUTH_PASSWORD")
+
 if config_env() == :prod do
   config_path =
     System.get_env("CONFIG_PATH") ||