Container Support

When the content app is running over HTTP deployed behind a reverse proxy running on HTTPS, the content app does not properly detect the url that the request is coming in as and fails to validate the provided auth token.

As an example, my CONTENT_ORIGIN is set to "https://hostname.example.com", a fetch to the api, would generate an auth token based on this URL:

https://hostname.example.com/pulp/container/default_organization-foo-foobar/manifests/latest

however, when the request is redirected to that URL, and proxied back to the content app, the content app tries to get the URL that is coming in and gets a url that looks like:

http://hostname.example.com/pulp/container/default_organization-foo-foobar/manifests/latest?validate_token=BLAH

It seems to think that the request is coming in over 'http' since the content app is running over http. In addition, it seems to be ignoring the port #, so if CONTENT_ORIGIN was configured to a non-standard port, comparison would also fail (although this is not a concern for us at this time).

I think it makes sense to just create and validate the token based off the request path, and ignore hostname, protocol, and port

Some relevant links showing why/where this is a problem: https://docs.aiohttp.org/en/stable/web_advanced.html#deploying-behind-a-proxy https://github.com/aio-libs/aiohttp/blob/72b5344af59ccdefc1e9a9e489c222a2b2592c7d/aiohttp/web_request.py#L384-L386 https://github.com/pulp/pulp_container/blob/789979a8706c527e4c9e8d04d084b262ea78208f/pulp_container/app/models.py#L442