fix: updates to get dapp working with community-dev

[samsiegart]

Summary

Get dapp working with community-dev

Details

The dapp hasn't been updated to align with platform changes in some months. Highlights of the fixes include:

• Better use of agoric-sdk community-dev branch for a more stable foundation
• Update a few zoe calls based on API changes
• Update Far to come from '@endo/far`
• Update CI to use node 16
• Update README with new instructions
• Update the bridge URL from local.aggoric.com to wallet.agoric.app/locator

Testing

Manually ran dapp in a clean checkout w/ a clean checkout of agoric-sdk following the new instructions in README and was able to bid on a card, have the bid accepted.

[ivanlei]

from @michaelfig

you should be able to use agoric install community-dev to get further (I got past the marshal errors). Now I get test failures in test/test-contract.js pertaining to no more zoe.makeFeePurse nor zoe.bindDefaultFeePurse. That’s just an API change, and the solution to it is to remove all references to the feePurse and just use zoe directly instead of trying to bind it.

[turadg]

Changes overall look good. Before merge the commits should be cleaned up to use conventional commits style and to squash the fixups into the commit nominally changing. E.g. "WIP: yarn once again works locally" should be part of the lint fix.

Incidentally, all commits are implicitly "WIP" until they reach master so I suggest leaving that off in the future.