syncthing-app-alt/supervisor/syncthing.conf

[program:syncthing]
priority=20
environment=HOME=/app/data/folders,STNOUPGRADE=1
; -no-browser opens up the browser (for desktop app preumably)
; auditfile "-" means log to stdout
command=/app/code/syncthing -gui-address=127.0.0.1:3000 -home=/app/data/config -no-browser -auditfile=-
user=cloudron
autostart=true
autorestart=true
stdout_logfile=/dev/stdout
stdout_logfile_maxbytes=0
stderr_logfile=/dev/stderr
stderr_logfile_maxbytes=0