Dev: Support https in development environments

[benjaoming]

Why

Depends on: readthedocs/common#176
Supersedes: #10265 (split up)

This setup enables a developer to:

• Run development environments behind HTTPS
• Use a custom production domain and subdomains
• Test developer's own GitHub OAuth applications

What

Changes to docker-compose setup:

• Storage HTTPS compatibility: Docker container for storage needs additional configuration
• Custom domain w/ https possible: Additional settings to traverse from inv to settings.docker_compose
• New socialauth options in settings.docker_compose to enable https
• New setting to disable a suspicious host check in new unresolver

Changes

This PR was originally intended to add https compatibility to the storage container, but turned out a few more things beyond the inv docker.up --ngrok=custom.dev.example have been necessary

---

📚 Documentation previews 📚

• User's documentation (docs): https://docs--10385.org.readthedocs.build/en/10385/

• Developer's documentation (dev): https://dev--10385.org.readthedocs.build/en/10385/

[humitos]

I'm closing this PR for now since we don't require HTTPS when working on development environment locally. We can come back if we decide we want to maintain this implementation.