Not a markdown server, but an in-tree ACME SSL provisioning module for Apache. I think Caddy deserves some praise for marketing this a standard built-in featur

Not a markdown server, but an in-tree ACME SSL provisioning module for Apache. I think Caddy deserves some praise for marketing this a standard built-in feature. For nginx there is ngx_http_acme_module unmaintained, unpackaged and out-of-tree, and https://trac.nginx.org/nginx/ticket/1480 https://trac.nginx.org/nginx/ticket/1480 is still open upstream...