Caching

[jonsharratt]

What did you implement:

New option CODEBOX_CACHE that allows npm installs to now cache the dependencies so that you do not have to rely on the public registry.

How did you implement it:

• Checks if cache option enabled
• Stores an index.json file within a separate S3 cache bucket
• Scheduled lambda runs every hour to then cache all versions of each package.
• It checks the revision against public registry if changed will refetch the packages and update the cache.

How can we verify it:

• Enable cache
• Deploy and attempt use and npm install packages
• The cache will eventually populate and any further packages will then use the cache instead

Todos:

• [x] Write tests
• [x] Write documentation
• [x] Fix linting errors
• [x] Tag ready for review or wip

Is this a breaking change?: NO

[WalterWeidner]

Any chance of this PR getting merged? We would love to get the added benefit of caching.

[WetHippie]

Add another +1 to the request for caching. Makes a big difference in CI build environments that are continuously building.