Minor tuning of Caddy configuration and improved documentation.

caddy/Caddyfile

@@ -8,7 +8,8 @@ localhost {
 	# Public paths (no auth)
 	@public path /favicon.ico /.well-known/*
 	handle @public {
-		reverse_proxy :3000
+		root * /var/www/
+        file_server
 	}
 	# Respond with user's display name
 	handle_path /hello {

caddy/auth/require

@@ -11,7 +11,6 @@ forward_auth {$AUTH_UPSTREAM:localhost:4401} {
         Remote-Role
         Remote-Role-Name
         Remote-Session-Expires
-        Remote-Session-Type
         Remote-Credential
     }
 }

caddy/auth/setup

@@ -2,5 +2,5 @@
 header -Remote-*
 @auth_api path /auth /auth/*
 handle @auth_api {
-    reverse_proxy {$AUTH_UPSTREAM:localhost:4401}
+    reverse_proxy {$AUTH_UPSTREAM::4401}
 }