Add option to activate others NETDATA notification methods.

[leobaldoneto]

NETDATA has a lot of notification options: https://learn.netdata.cloud/docs/alerting/notifications/netdata-agent-notifications/

How can I enable one using the caprover setup?

I want to enable the NTFY one: https://learn.netdata.cloud/docs/alerting/notifications/netdata-agent-notifications/ntfy

I saw that the build script replace health_alarm_notify.conf configs that are set in Docker's .env, but I can't simply add new environments there because CapRover don't allow to add new variables to NETDATA container.

How can I solve that?

[uhlhosting]

@leobaldoneto you can always submit a PR.