refactor: generate mdx docs with tabs for each config option (#996)

.env.example

@@ -4,6 +4,10 @@
 
 # The base URL where the app is hosted.
 TINYAUTH_APPURL=
+# Path to config file.
+TINYAUTH_CONFIGFILE=
+# Label provider to use for ACLs (auto, docker, kubernetes or none to disable). auto detects the environment.
+TINYAUTH_LABELPROVIDER="auto"
 
 # database config
 
@@ -233,8 +237,6 @@ TINYAUTH_TAILSCALE_APITOKENFILE=
 TINYAUTH_TAILSCALE_TAILNET=
 # Cache duration for Tailscale device and user lists in seconds.
 TINYAUTH_TAILSCALE_CACHEDURATION=300
-# Label provider to use for ACLs (auto, docker, kubernetes or none to disable). auto detects the environment.
-TINYAUTH_LABELPROVIDER="auto"
 
 # log config