TCA-1077 free promo

[kkartunov]

Implements free promo, banner, details and enrollment pages.

[testflyjets]

Based on how this is implemented we will have to do a similar code change to undo this. Did we give consideration to having a toggle, for example, via an env var, to turn the "FREE" on and off?

[vas3a]

@kkartunov can you use either svg or css gradients for the yellow/orange backgrounds? 66KB is pretty high for this. (see issues raised by QA & glenn that the BG for the enrolled modal which was 50KB was loading slowly)

Otherwise, looks good to me

[kkartunov]

@kkartunov can you use either svg or css gradients for the yellow/orange backgrounds? 66KB is pretty high for this. (see issues raised by QA & glenn that the BG for the enrolled modal which was 50KB was loading slowly)

Otherwise, looks good to me

@testflyjets yeah, that is my general approach. In this cas tho' there are some figures in that gradient, less visible but they are there, which I am tying to have as per design.