How to provide CA certs for ListenAndServeTLS function
<p>It says that in the docs</p>

<p>"ListenAndServeTLS acts identically to ListenAndServe, except that it expects HTTPS connections. Additionally, files containing a certificate and matching private key for the server must be provided. If the certificate is signed by a certificate authority, the certFile should be the concatenation of the server's certificate, any intermediates, and the CA's certificate."</p>

<p>Yet i can barely understand what <code>concatenation</code> and <code>intermediates</code> actually mean.
Could anyone please kindly give me an example? Thanks in advance.</p>

<p>Btw, i don't wanna load CA cert in the tls.Config, which works well definitely;)</p>