feat: add application images to docs

[eveumutoni]

Added 3 new Application Image documentations under SC Compute to help users find guides on our 3 images before they even create a compute

[greptile-apps]

Greptile Summary

The PR adds user documentation for the Coolify, Dokploy, and Supabase Compute application images.

• Adds an Application Images navigation group under SC Compute.
• Documents image contents, setup, login, management, and security guidance for all three images.
• Revises the Supabase security note to acknowledge that Docker-published ports can bypass UFW.

Confidence Score: 4/5

The PR should not merge until the Supabase security guidance accurately covers both Docker-published database ports and removes the conflicting firewall assurance.

The revised note acknowledges Docker's UFW bypass but checks only port 5432, while the shipped image also exposes Supavisor on port 6543 and the document still claims all other incoming traffic is blocked.

Files Needing Attention: services/compute/images/supabase.mdx

Important Files Changed

Filename	Overview
docs.json	Adds the three application-image guides to the SC Compute navigation.
services/compute/images/coolify.mdx	Adds setup, access, management, and security documentation for the Coolify image.
services/compute/images/dokploy.mdx	Adds setup, access, management, and security documentation for the Dokploy image.
services/compute/images/supabase.mdx	Adds the Supabase image guide and revises its database-exposure warning, but the previously reported direct-port guidance remains unresolved.

_{Reviews (2): Last reviewed commit: "fix: improve clarity and correctness in ..." | Re-trigger Greptile}

[eveumutoni]

@greptileai please rereview the PR and update the confidence score