Add minting guidelines what's best sizes of the mint

[yangwao]

I guess we should prepare one dedicated page where we can show people what's best to mint on kodadot for optimal experience and then we can link it from kodadot.xyz minting interface

[damskyftw]

What do you mean with "best to mint" and "optimal experience" ?

Do you mean in terms of file type, or overal style of the mint? (i.e. it's quite easy to mint jpegs and pngs, more advanced is videos/3d animations)

Or make an tutorial on different file types you can mint and explain them a bit?

[thea-exe]

^^