Add more handbook reading, and getting comfortable coding

See merge request !14

Add the change label to the change issue template

See merge request !12

Bring the checklist for change from the handbook

See merge request !11

from https://about.gitlab.com/handbook/infrastructure/#production-change-checklist

Added folder for templates, and added onboarding template

See merge request !10

Updated the docs with some recent information

Closes #787

See merge request !9

Update the infra arch graph, fix one typo and point to public monitoring

See merge request !8

Add Overview Doc

See merge request !6

Added architecture diagram

See merge request !7

Add note about bluestore and how it can be mixed

See merge request !5

Add links to the main readme to point to design decisions

So they are visible from the front README of the project

See merge request !4

Add storage and networking documentation with our last agreements

This is what I mean, that instead of keeping the infrastructure documentation in the chef repo we can use the infrastructure repo which can be public.

We could just make it all public this way and keep the documents up to date by writing markdown and just using git.

cc/ @stanhu

See merge request !3

Add Git Blackbox monitoring url

See merge request !2

Add quick guide for system graphs

See merge request !1