• That link is never going to work:

    ~ $ curl -vvvv https://groob.io/posts/go-sysadmin

    * Trying 107.170.65.25...

    * TCP_NODELAY set

    * Connected to groob.io (107.170.65.25) port 443 (#0)

    * TLS 1.2 connection using TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384

    * Server certificate: groob.io

    * Server certificate: Let's Encrypt Authority X3

    * Server certificate: DST Root CA X3

    > GET /posts/go-sysadmin HTTP/1.1

    > Host: groob.io

    > User-Agent: curl/7.51.0

    > Accept: */*

    >

    < HTTP/1.1 301 Moved Permanently

    < Content-Length: 185

    < Content-Type: text/html

    < Date: Thu, 15 Dec 2016 21:16:14 GMT

    < Location: http://localhost/posts/go-sysadmin/

    < Server: Caddy

    < Server: nginx/1.9.15

    <

    Caddy seems to be slightly misconfigured, localhost is quite a different host for me :).