add the timeout option to example compose file

Signed-off-by: ngn <ngn@ngn.tf>

docker-compose.example.yml

@@ -6,6 +6,7 @@ services:
       APP_URL: "https://ao.example.com"
       JWT_SIGNING_SECRET: "topsecret"
       FLARESOLVER: "http://flaresolverr:8191"
+      TIMEOUT: "120" # flaresolverr timeout, in seconds
       THEME: "dark"
     ports:
       - 8080:8080