Ipfs gateway

[anxolin]

Summary

Modifies the gateway so we don't depend on Gnosis one any more.

We default to cloudflare, however, this will be modified by ENV so we use https://ipfs.cow.fi/ipfs

This PR adds the required ENV variable

Related PR

Related to this PR, i had to do this PR to allow me to modify the IPFS gateway

cowprotocol/app-data#24

Technical note

Fixed Elena's reported problem, apparently, it was a non-configurable property, and we were trying to delete it.

If you are curious, I'm using this to check if it can be deleted before doing so
#475

To Test

1. Make sure the app-data in the orders is loaded using https://ipfs.cow.fi/ipfs using Cloudflare (since our gateway has some permission issues

https://explorer-dev-git-ipfs-gateway-cowswap.vercel.app/orders/0x31dda03282cbf2010826c0bd95bc6fcb050969142b6fb8d4f870b6c32a0bf211fbe87d602f7d7dd511349be4acf58842392124a06452a858?tab=overview

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Pull request alert summary

Issue	Status
Install scripts	✅ 0 issues
Native code	✅ 0 issues
Bin script shell injection	✅ 0 issues
Unresolved require	✅ 0 issues
Invalid package.json	✅ 0 issues
HTTP dependency	✅ 0 issues
Git dependency	✅ 0 issues
Potential typo squat	✅ 0 issues
Known Malware	✅ 0 issues
Telemetry	✅ 0 issues
Protestware/Troll package	✅ 0 issues

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📊 Modified Dependency Overview:

⬆️ Updated Package	Version Diff	Added Capability Access	+/- Transitive Count	Publisher
@cowprotocol/[email protected]	0.1.0-alpha.0...0.1.0	None	+0/-0	cowprotocol_dev

[alfetopito]

Can we make a regular release instead?
There are minimal changes of low impact pending to be released

[anxolin]

Ok! no problem from my side.

[elena-zh]

Appdata page is not working in the PR https://explorer-dev-git-ipfs-gateway-cowswap.vercel.app/appdata?tab=encode

[anxolin]

Thanks @elena-zh ! this error was un-expected, since I'm only changing the URL. I did a small change to make it more resilient.

I tested to update a document to IPFS, and it worked for me https://cloudflare-ipfs.com/ipfs/QmNpXBgqMCKiKcbSFGSuYLyUmkGd9LXaZA3HMP3hXtMJXX

[elena-zh]

LGTM now!