Example for issue 2407

see caddyserver/caddy#2407

Usage

• install docker
• install docker-compose
• see/change docker-compose.yaml, variable caddy_revision
• build and start:

  docker-compose up --build

Bug

Starting caddy-example_proxy_1 ... done
Attaching to caddy-example_proxy_1
proxy_1  | 2019/01/22 23:37:39 [ERROR] Loading persistent UUID: open /config/uuid: permission denied
proxy_1  | 2019/01/22 23:37:39 [ERROR] Persisting instance UUID: open /config/uuid: permission denied
proxy_1  | Activating privacy features... 2019/01/22 23:37:39 [INFO] [asdas.net] acme: Obtaining bundled SAN certificate
proxy_1  | 2019/01/22 23:37:40 [INFO] [asdas.net] AuthURL: https://acme-v02.api.letsencrypt.org/acme/authz/h5jIf94Ja8RvbcsIVOEoNj0PeerDZovjY5vfEDybq-k
proxy_1  | 2019/01/22 23:37:40 [INFO] [asdas.net] acme: use tls-alpn-01 solver
proxy_1  | 2019/01/22 23:37:40 [INFO] [asdas.net] acme: Trying to solve TLS-ALPN-01
proxy_1  | 2019/01/22 23:37:40 [asdas.net] failed to obtain certificate: acme: Error -> One or more domains had a problem:
proxy_1  | [asdas.net] [asdas.net] acme: error presenting token: presenting with standard provider server: could not start HTTPS server for challenge -> listen tcp :443: bind: permission denied
caddy-example_proxy_1 exited with code 1