Add support for auto-update

[nchamo]

We should add some opt-in auto-update feature that updates the catalyst server when a new version is released.

There are two different types of updates:

• Updates to the catalyst itself
• Updates to this repository

Ideally, both would be handled automatically. This might requiere some re-thinking the whole update process

[menduz]

Please take a look at what we are doing from the infra side: https://github.com/decentraland/adr/blob/main/docs/ADR-21-update-cycle-of-catalysts.md

It involves us to publish new versions of the images to SNS topics (public topics anyone can subscribe to) and specific code running in crontab (in this repo) to update the catalysts based on SQS topics

[nchamo]

Interesting. The only thing I see missing is the possibility of having changes in this repo update themselves too. If not done correctly, then it could lead to some issues, but we might mitigate that by identifying breaking of non-breaking changes, and have the automatic update depend on that.

Ideally, we would stop having people use the repository directly, and make it "more like a product/library".

[agusaldasoro]

My two cents here: it would be nice to have the catalyst in .zone able to auto-update to the next version also.

[menduz]

We could do it effortlessly, the only thing to do it is to send an SNS notification to the topic arn:aws:sns:us-east-1:619079673649:decentraland-catalyst-latest-version

[nchamo]

We would also need decentraland/catalyst#450, right?

[menduz]

Disregard SQS solution, investigate ways to update all catalysts