Provide SSL deployment examples for users

[srstsavage]

We should provide some examples/guidance for users on common SSL/TLS deployment strategies. While there are many ways to achieve this, some common approaches including using existing certificates directly with Tomcat or a webserver (e.g. nginx or Apache), or autogenerating and updating free certificates using letsencrypt (example nginx-proxy/acme-companion).

Decoupled from #225.