add config section

README.asciidoc

@@ -76,8 +76,36 @@ go install ./cmd/enbas
 
 == Configuration
 
+Enbas uses Go's https://pkg.go.dev/os#UserConfigDir[os.UserConfigDir()] function to determine the
+location of your configuration directory.
+
+If you've set the `XDG_CONFIG_HOME` environment variable, the configuration files will be stored in the `$XDG_CONFIG_HOME/enbas` directory.
+
+If this is not set:
+
+- on Linux the configuration directory will be set to `$HOME/.config/enbas`.
+- on Darwin (MacOS) the configuration directory will be set to `$HOME/Library/Application Support/enbas`.
+- on Windows the configuration directory will be set within the `%AppData%` directory.
+
+If (for whatever reason) any of the above cannot be determined, the configuration directory will be set to
+the current working directory.
+
 == Usage
 
+=== Check the build information
+
+=== Check out the help documentation
+
+=== Log into your GoToSocial account
+
+=== View your account information
+
+=== View a remote account
+
+=== View your timeline
+
+=== View a status
+
 == Inspirations
 
 This project was inspired from the following projects: