Updating PHP-Version in nginx-passbolt.conf

[b-me1]

I just did an do-release-upgrade to upgrade Ubuntu 20.04 to Ubuntu 22.04.
After that the Passbolt-server was giving me a 502 Gateway-Error message.

First thought was that i need to change the apt-repository from focal to jammy - but that wasn't the case since a jammy repository doesn't exist.
The healthcheck sudo -H -u www-data bash -c "/usr/share/php/passbolt/bin/cake passbolt healthcheck" said that it couldn't reach the service but wasn't pointing me in the right direction.

[FAIL] Could not reach the /healthcheck/status with the url specified in App.fullBaseUrl

Then i tried to reconfigure the instance via sudo dpkg-reconfigure passbolt-ce-server - that didn't do it either.

It took some time to figure out that in nginx-passbolt.conf there was a hard reference to php7.4 that needed to be changed to php8.1:

    fastcgi_pass             unix:/run/php/php7.4-fpm.sock;

It seems that nginx-passbolt.conf will never be rewritten even on a complete reinstall, once it exists:

if [ -d "$NGINX_SITES_AVAILABLE" ] && [ -d "$NGINX_SITES_ENABLED" ] && [ ! -f "$NGINX_CONF" ]; then
                                                                         ^--

I think it might be useful to regenerate nginx-passbolt.conf during dpkg-reconfigure.
Or to use the link to the currently installed version /run/php/php-fpm.sock (That's what i did now - but I'm not sure if it exists in all distributions).