Better docs for deployment process and removing bad deployments

[andrewpking]

Better Docs for deployment process

• A lot of users in the issues page are complaining of issues in their deployment.
• Most of these have to due to confusion about what FEEDGEN_HOSTNAME env variable represents
• Do I need my own private server to publish feeds, or can I resolve them to be published to bluesky's servers? This is not made clear in the docs.

Docs do not include steps for unpublishing a feed

• I was able to figure it out by reading the code
• It might help to have docs for people who are less experienced with using typescript
• Its just one command

Update docs for new command line process for deploying

• The docs are out of date and ask people to edit the code to provide variables
• Now the variables are collected by the command line interface
• Update the docs to match the current process.