blumen ping 
Ping an endpoint until it resolves content.
sh
blumen ping <cid> <gateway url>Options 
max-retries 
Default: Infinity
Amount of retries after which pinging stops if it failed to resolve before.
retry-interval 
Default: 5 seconds
Interval between retries (in ms)
timeout 
Default: 10 seconds
Request timeout until next attempt (in ms)