Support for running static content apps on Apache HTTP Server

[kvedurmu]

One thing to think supporting in this buildpack is the ability for users to use Apache HTTP Server to serve static content apps.

Provided the app has a buildpack.yml with the structure below, users would run pack build --buildpack paketo-buildpacks/httpd --buildpack paketo-buildpacks/staticfile.
Buildpack.yml

staticfile:
  httpd:
    root: "public"
     ...... # other keys