List out key features, esp. in comparison to similar tools

[coco98]

Features:

• Public key based auth
• No assumptions about directory structure (configure dockerfile path)
• Rollout deployments in any namespace
• Easy to fork and customise
• Super easy to use and configure

[marcellodesales]

You could add #27, Helm Apps, which falls into the same category... Ease of use.

[tirumaraiselvan]

Key features have been listed in https://github.com/hasura/gitkube/tree/master#features . Keeping this issue open for further addition of comparisons with other tools, etc