In cloud 9, you need to go to the dynamic domain released for your workspace. Usually this
https://<WORK SPACE NAME>-c9-<YOUR USER NAME>.c9.io/
You can verify this by sailing, then click Preview โ Preview with webserver
If your sails.js is configured as follows, then it will work on port 80 because cloud nine will indicate the port.
port: process.env.PORT || XXXX,
If instead you directly indicate your port, then it will be set to XXXX
port: XXXX,
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