aseidl

You can get by with one designed for 2.4GHz wifi if those are easier to acquire. They were < $50 on Amazon when I did my build a year or so ago.

Just have to flatten the front a bit and push it out by about an inch. I used a short piece of pvc pipe and some zipties.

Correct, the speedups are directly due to bundle caching (which previously had only been available for private/paid repos). Indirectly, I would assume this caching is now implemented via Docker's use of filesystem layers.

Some rough numbers: bundle install has gone from ~50s to 3s for my Jekyll + s3_website setup. The overall build has dropped from ~120s to 45s thanks to that and using a cached version of Ruby.

One gotcha for anyone with a similar setup: make sure Jekyll's _config.yml is set to exclude/ignore the vendor directory. Oops.