Separate free and premium notedeck install instructions

[danieldaquino]

This PR allows us to separate free install instructions from premium/paid ones.

Test

api: abcdd1f
website: 322171d3f9a8c92568b822c54568021495d767e2
Setup: Local testing setup

1. Moved .env away temporarily and ran npm test. Tests passing
2. Ran npm run type-check-compare. No new type warnings or errors
3. Performed functional test:
   1. Went to the page without any login. Confirmed the free instructions appear
   2. Logged in. Confirmed that the paid instructions appear
   3. Forcibly modified session token to "null". Confirmed the free instructions appear
   4. Forcibly modified session token to a random number. Confirmed the free instructions appear
   5. Forcibly deleted session token. Confirmed the free instructions appear
   6. Forcibly recovered session token to a valid one. Confirmed the paid instructions appear

Results: PASS

[danieldaquino]

All CI tests passing:

# { total: 579, pass: 579 }
# time=51687.737ms
Error: Process completed with exit code 1.

It's marked as a fail due to known CI configuration issue: #10