[ajcornett]

We are using https://github.com/janeczku/haproxy-acme-validation-plugin to provide ACME support directly in HAProxy without an extra backend. Example:

    frontend example.com
        bind 192.168.1.100:80
    
        # Redirect ACME domain validations
        acl url_acme_http01 path_beg /.well-known/acme-challenge/
        http-request use-service lua.acme-http01 if METH_GET url_acme_http01
    
        # Redirect all plain HTTP traffic to HTTPS
        redirect scheme https code 301 if !{ ssl_fc }