haproxy-cfg

global
        log /dev/log    local0
        log /dev/log    local1 notice
        chroot /var/lib/haproxy
        stats socket /run/haproxy/admin.sock mode 660 level admin
        stats timeout 30s
        user haproxy
        group haproxy
        daemon

        # Default SSL material locations
        ca-base /etc/ssl/certs
        crt-base /etc/ssl/private

        # See: https://ssl-config.mozilla.org/#server=haproxy&server-version=2.0.3&config=intermediate
        ssl-default-bind-ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384
        ssl-default-bind-ciphersuites TLS_AES_128_GCM_SHA256:TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256
        ssl-default-bind-options ssl-min-ver TLSv1.2 no-tls-tickets

defaults
        log     global
        mode    http
        option  httplog
        option  dontlognull
        timeout connect 30
        timeout client  2h
        timeout server  2h
        timeout tunnel  2h
        errorfile 400 /etc/haproxy/errors/400.http
        errorfile 403 /etc/haproxy/errors/403.http
        errorloc 404 https://thispagedoesnotexist.mydomain.dev
        errorfile 408 /etc/haproxy/errors/408.http
        errorfile 500 /etc/haproxy/errors/500.http
        errorfile 502 /etc/haproxy/errors/502.http
        errorloc 503 https://somethinghappened503.mydomain.dev
        errorfile 504 /etc/haproxy/errors/504.http

frontend www-https
#        bind mypublicip:443 ssl crt /etc/haproxy/ssl/mydomain.dev/cert.pem
        bind mypublicip.145:443

        http-request set-header X-Forwarded-Proto https
        http-request set-header X-Forwarded-Host %[req.hdr(Host)]
        http-request set-header X-Client-IP req.hdr_ip([X-Forwarded-For])
        http-request add-header X-Forwarded-Port 443
        http-response set-header Strict-Transport-Security "max-age=16000000; includeSubDomains; preload;"
        acl letsencrypt-acl path_beg /.well-known/acme-challenge/
        use_backend letsencrypt-backend if letsencrypt-acl

        acl gokapi hdr(host) -i files.mydomain.dev
        use_backend gokapi if gokapi

        default_backend www-backend

frontend www-http
        bind mypublicip:80
#        http-request set-header X-Forwarded-Proto https
        http-request set-header X-Forwarded-Host %[req.hdr(Host)]
        default_backend www-backend

backend letsencrypt-backend
        server letsencrypt 127.0.0.1:54321

backend gokapi
        acl is_root path /
        http-request redirect code 301 location https://files.mydomain.dev/login if is_root
        option forwardfor
        option httpchk GET /login
        http-check expect status 200
        timeout client 120m
        timeout server 120m
        option http-server-close

        server gokapi-server 127.0.0.1:53842 check inter 2s

backend www-backend
        http-request redirect scheme https code 301 unless { ssl_fc }

        server catchall 127.0.0.1:443