[EPIC] Update workflows for the Hub Service Guide (docs.2i2c.org) to aid support work

[jnywong]

This aims to create "runbook"-style content in Hub Service Guide to aid support processes.

### Tasks
- [ ] https://github.com/2i2c-org/docs/issues/210
- [ ] https://github.com/2i2c-org/docs/issues/215
- [ ] https://github.com/2i2c-org/docs/issues/216
- [ ] https://github.com/2i2c-org/docs/issues/218