Devops: Add a documentation page of all our logs files

[syphax-bouazzouni]

Goal

Have a list of all our log files, with a small description of each so that we can have technical people (or no technical) debug their appliance.

Currently, there is not really a similar document in our documentation (I tried the search with the logs keyword)

TODO

• Do a working document to list and document our logs
• Do a pull request for it