switched dao to prisma / postgres.

[alexbodn]

first i owe a big thank for the extensive knowledge you've shared in your tutorial.
followed suit until mongodb was needed, and it won't run on my arm chromebook.

only now i forked since i wanted to contribute my small part.

my postgresql solution works even on my chromebook, did work with prisma and passed all tests.
without testing myself, prisma would also run mongo, so anybody could benefit.

also updated some packages versions to eliminate errors and pass the tests.

please feel free to profit of any piece of this code.

thank you very much again,
alex