Issues I've faced/reported as a result of this project:
1. Airsonic HTTPS proxying is broken. Reported: https://github.com/airsonic/airsonic/issues/641
2. Traefik docker backend security headers were broken with dashes. Reported at https://github.com/containous/traefik/issues/2493, and fixed by https://github.com/containous/traefik/pull/2496
3. Headphones dies repeatedly with no error logs. Yet-to-report.
4. Terraform doesn't parse mariadb version numbers. Report: https://github.com/terraform-providers/terraform-provider-mysql/issues/6. Got this fixed myself by filing a PR: https://github.com/hashicorp/go-version/pull/34
5. elibsrv didn't support ebook-convert, only mobigen. PR is at https://github.com/captn3m0/elibsrv/pull/1. I've to get this merged upstream for the next release.