Reorganizes file upload to use a backend server#4

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ottpeter wants to merge 4 commits intoottpeter:masterfrom

DAOrecords:reorganize-file-upload-to-backend

Commits on Mar 11, 2022

Adds basic Express app with 2 upload routes, ipfs add works
ottpeter
committed

Commits on Mar 13, 2022

Adds IPFS pinning logic to backend
ottpeter
committed

Commits on Mar 14, 2022