what does "cook up" mean in this sentence?

[Aleaf]

I read an article today. Here is a sentence :
A fifty-something Minneapolis lawyer named John Hideraker sits down in his kitchen with a laptop and some simple software and cooks up a website.

i know cook up means

a.to concoct or contrive, often dishonestly. eg,She hastily cooked up an excuse.
b.to falsify.eg Someone had obviously cooked up the alibi.
what does "cook up" mean in this sentence?

Thanks in advance for explaination.
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Try to change youself before you try to change others.

[Lost_Soul]

to create amateurishly? (why dont you like "concoct"? it is the same as create in that context)

[Aleaf]

the bold words in a and b of my post above such as concoct ,contrive,falsify sound like negative words from the examples.

It is the reason that i can't understand.

It seems that because the lawyer doesn't specializes in computers, the phrase of cook up was used here to show he did it amateurishly.
am i right?[/b]
_________________
Try to change youself before you try to change others.