Subscription model

[hannydevelop]

Describe the solution you'd like
I would like a subscription model for Peppubuild users, separating freemium and pro users. First, separate users into freemium and pro users, with freemium users getting little, restricted access and pro users getting all features. Divide pro users into two segments too, where people pay or use the referral link. Referral of 5 users to 1 month and a maximum of 10 users to 2 months for free.

Additional context
I would suggest integrating the following steps:

• Create license key (https://github.com/indianazhao/nodejs-license-key).
• Make sure referral emails are not catfish with firebase verification.
• Create an onboarding flow and subscription tracker.

[hannydevelop]

This should be ready Tuesday (Dec 12, 2023)