Add wiki.js

[h3mmy]

Details

Describe the solution you'd like:

Addition of wiki.js for internal documentation

Project page: https://github.com/Requarks/wiki

Anything else you would like to add:

Pieces:

• Add postgres instance for #5744 #5770
• Storage provisioning (blobs) - According to the official docs "All content is stored in the database"
• Auth Setup (keycloak SAML/OIDC)
• Networking/SSL
• Monitoring (logs, alerts, metrics)

Backup strategy is included in each piece

Additional Information:

[h3mmy]

Current blocker (resolved in #5770): deciding on DB setup. I want to use cnpg with local path storage. However, I don't have much local path space. If I don't want to wait to expand it, I could use a single postgres node with rook-ceph for block replication. Then once I am eventually able to "upgrade" my local storage capacity, I can migrate that over.

[h3mmy]

Wikijs doesn't support auth like I expected. While the deployment is in place I'm not sure it's the best option currently. Being forced to use a separate localhost only account for editing and then oidc/SAML for read isn't a practical long term solution for me