fix(gluetun): add example config.toml

quadlets/gluetun/config.toml

@@ -0,0 +1,8 @@
+[[roles]]
+name = "qbittorrent"
+# Define a list of routes with the syntax "Http-Method /path"
+routes = ["GET /v1/openvpn/portforwarded"]
+# Define an authentication method with its parameters
+auth = "basic"
+username = "myusername"
+password = "mypassword"