I have setup a website checkops to build collection of open checklists for tech activities and avoid common issues.
Example checklist here :
https://checkops.com/checklist/website-launch.
These checklists are based on markdown files and open on GitHub here
https://github.com/checkops/checklists where anyone can suggest or contribute changes on this
Looking forward to your feedback/suggestions or how to make it more useful for web developers ,designers, testers etc