Give CI some love

[azerella]

• Reduced specs for CF deployment
• Added CI caching
• Streamlined CI manifest

[azerella]

Blocked on CF being dumb:

-----> Building dependencies
       Prebuild detected (node_modules already exists)
       Rebuilding any native modules
> @gov.au/[email protected] postinstall /tmp/app/node_modules/@gov.au/accordion
> pancake
npm ERR!     /home/vcap/.npm/_logs/2019-03-22T05_49_35_533Z-debug.log
sh: 1: pancake: not found
npm ERR! file sh
npm ERR! code ELIFECYCLE
npm ERR! errno ENOENT
npm ERR! syscall spawn
npm ERR! @gov.au/[email protected] postinstall: `pancake`
npm ERR! spawn ENOENT
npm ERR! 
npm ERR! Failed at the @gov.au/[email protected] postinstall script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
       **ERROR** Unable to build dependencies: exit status 1
Failed to compile droplet: Failed to run all supply scripts: exit status 14
Exit status 223
Cell b688f6b5-0dd5-4ac2-9da8-aa3b635443f7 stopping instance 82fa4049-7bad-4779-9a7d-1004cb8f54fb
Cell b688f6b5-0dd5-4ac2-9da8-aa3b635443f7 destroying container for instance 82fa4049-7bad-4779-9a7d-1004cb8f54fb
Cell b688f6b5-0dd5-4ac2-9da8-aa3b635443f7 successfully destroyed container for instance 82fa4049-7bad-4779-9a7d-1004cb8f54fb

https://circleci.com/gh/govau/furnace/263