Support for basic_auth

[simplesteph]

thoughts about supporting basic_auth ?
Basically I'm thinking of VIRTUAL_BASIC_AUTH=admin:hashedpassword by leveraging apache2-utils. Each container could optionally have that variable which would allow us to generate the htpassword dynamically at /etc/nginx/htpassw/$VIRTUAL_HOST

[lucaschain]

Maybe there should be a dynamic way to add any directives to the config file passing the key and the value to the env var

[codesuki]

Having basic auth seems useful!

For dynamically adding things I would prefer a way to specify your own template and be done with it. That seems easier to maintain too (user perspective).

I am currently very busy but in about 2 weeks I hope to have more time. Maybe I can find some time in between to add some things. I appreciate your feedback.

[codesuki]

@lucaschain
codesuki/ecs-nginx-proxy#14