Raspbian / Mercure - bind: permission denied - symfony

Question

I'm trying to run Mercure on my Raspbian.
First :
I tried with mercure-legacy_0.13.0_Linux_armv6.tar.gz using the following command to run mercure
JWT_KEY='example'; ADDR='localhost:3000'; DEMO='1'; ALLOW_ANO NYMOUS='1'; CORS_ALLOWED_ORIGINS='*'; PUBLISH_ALLOWED_ORIGINS='*'; PUBLISHER_JWT_KEY='example' ./mercure run
It returns :
"msg":"Unexpected error","error":"listen tcp :80: bind: permission denied"
Second : I tried with mercure_0.13.0_Linux_armv6.tar.gz using the following command to run Mercure
MERCURE_PUBLISHER_JWT_KEY='!ChangeMe!' MERCURE_SUBSCRIBER_JWT _KEY='!ChangeMe!' ./mercure run
Caddy file :
{
{$GLOBAL_OPTIONS}
}
{
auto_https off
}
{$SERVER_NAME:localhost}
log
route {
encode zstd gzip
mercure {
# Transport to use (default to Bolt)
transport_url {$MERCURE_TRANSPORT_URL:bolt://mercure.db}
# Publisher JWT key
publisher_jwt {env.MERCURE_PUBLISHER_JWT_KEY} {env.MERCURE_PUBLISHER_JWT_ALG}
# Subscriber JWT key
subscriber_jwt {env.MERCURE_SUBSCRIBER_JWT_KEY} {env.MERCURE_SUBSCRIBER_JWT_ALG}
# Extra directives
{$MERCURE_EXTRA_DIRECTIVES}
}
respond /healthz 200
respond "Not Found" 404
}
It returns :
run: loading initial config: loading new config: http app module: start: tcp: listening on :443: listen tcp :443: bind: permission denied
Can anyone provide a solution : I intend to host my symfony project on a web server using apache2 on the same Raspberrry

Answer 1

I don't know this specific application, but your error message:
listen tcp :80: bind: permission denied
could be related with restriction for ports 80 and 443 (second message) - non-root user cannot use ports lower than 1024 on standard Linux configuration. Try to use different port or (if you don't care about security - i.e. local hobby project) run app as root.
Keep in mind that you can run Nginx as reverse proxy, so you can run your app on any high port (like 3000) on standard user.

Answer 2

it's a rights issue with your user.
Try with sudo, it should work.