chore: update docs for new alerts and reporting feature (#13104)

* update docs for new alerts and reporting feature

* fix punctuation

* fix punctuation

* fix punctuation

fix bullets
fix redis depends on name in docker-compose template

* fix bullets

* Add extra steps for getting v1.0.1 running

step added: Upgrade the db
step added: init
step added: setup admin
fix redis superset naming
add . to docker build command

* fix worker to use gevent instead of prefork

change postgres to internal so it persists on docker-compose down

* add comments to superset_config.py

* ref: Re-organize a bit and make it easier to read

* ref: rm useless level

* docs: md changes + more details + kubernetes

* docs: Rename to Alerts and Reports

* docs: Link to Kubernetes doc

* docs: details for docker-compose + minor md changes

* docs: fix lists indent

* docs: remove unused config

* docs: Put detailed config and dockerfile before specific stuff

* docs: clean Dockerfiles

Co-authored-by: Valentin NOURDIN <[email protected]>