adapt instructions.md for CNTI

[martin-mat]

Refs #74

Pre-submission checklist:

Please check each of these after submitting your pull request:

• [ ] If this is a new entry, have you submitted a signed participation form?
• [ ] Did you include the product/project logo in SVG, EPS or AI format?
• [ ] Does your logo clearly state the name of the product/project/org and follow the other logo guidelines?
• [ ] If your product/project is open source, did you include the repo_url?
• [ ] Did you copy and paste the installation and configuration instructions into the README.md file in addition to linking to them?

[martin-mat]

Certified product logo guidelines left to CNCF and not intended to adapt it in this PR. Created a new issue to address it subsequemntly (#94).

Ready to review/merge.