EveBox: Opt out of default TLS and authentication

[Jason Ish]

EveBox will soon enable TLS and authentication by default in the master branch, however there will be flags to opt out of these features as SELKS wraps both of these features around EveBox. The following environment variables will take care of this:

    environment:
      - EVEBOX_HTTP_TLS_DISABLED=true
      - EVEBOX_AUTHENTICATION_REQUIRED=false

PR is incoming.

Reference:

• jasonish/evebox#255
• jasonish/evebox#274