I have run heroku local today, but I could not open the sample page in a browser.
ESET was blocking packets.

The settings below allowed for connection.

Version

ESET Cyber Security Pro 6.8.300.0

Firewall Setting

Application / Service

• Target: All applications

Action/Direction

• Action: Allow
• Direction: In

Protocol/Ports

• Protocol: TCP & UDP
• Ports: Local
• Local Port: 5000

Destination

• Destination: Entire Internet

Reference

https://github.com/heroku/go-getting-started