Default project image urls are hardcoded

[RamRamez]

We should always insert urls in image property, not numbers.

It makes App buggy, like:

Giveth/giveth-dapp#2546

[mohammadranjbarz]

@divine-comedian
It's a refactoring task, but you can create a project with default images and then in the playground you can get projectInfo and you should see a pinata link as image ( before this task it was a number instead of link)