Spike on how we enable static frontend apps for simplified init

[savannahostrowski]

Right now, buildpacks don't support this scenario and there's "magic"/"hacks" to make it work which make it a non-starter for the new init flow.

[weikanglim]

Current plan is to enable azd to influence Oryx to install + launch a static content webserver (likely nginx) to serve the static file content on the system.

This will require Oryx (w/ node runtime) to surface configuration options to achieve the target.

[weikanglim]

Oryx team will provide nginx capabilities long-term. Short-term, azd will be configuring the runtime image to achieve the hosting requirements