502 Bad Gateway - Change default update_boot to False to prevent service hang on reboot

[tmacr]

On a Raspberry Pi 4 with a fresh installation, the picobrew_pico service starts correctly on the first boot. However, after a reboot, the service gets stuck in a 'starting' state and the web server never becomes accessible, displaying http 502 - Bad Gateway.

This appears to be caused by the default setting update_boot: True in config.yaml triggering pip3 install -r requirements.txt (which doesn't complete) on every reboot.

Steps to reproduce the behavior:

• Flash the latest project image onto an SD card.
• Boot a Raspberry Pi 4 with the card. The server starts successfully.
• Reboot the Raspberry Pi.
• Observe that the service now fails to reach the 'running' state.

Expected behavior

• The Picobrew service starts successfully after every reboot.

Workaround

The issue is resolved by editing /etc/rc.local and commenting out the 3 lines below Updating Picobrew Server... . After this change, the service starts successfully on subsequent reboots.