Improve documentation, especially for deploying to web services.

[FiniteSingularity]

The documentation needs to be improved in several areas.

• [x] Example .env files: Now that the containers can be built using either sqlite3 or postgres, using an internal or external Redis server, and with our without using ngrok, we should show some example .env files.
• [ ] Document how to deploy TAU on various cloud services. I have currently tested deploying on Render.com, and will be testing on Azure and Vultr, but am looking for other platforms where people might deploy. Once this is tested, it would be great to add documentation to guide users through deployment.
• [ ] !!! Document windows line ending issues.