add dockerignore

2 jobs from master in 2 minutes 10 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
failed #548
atlasvoyages-prod-runner
build

02:10

 
  Deploy
skipped #549
atlasvoyages-prod-runner
deploy
 
Build build
npm ERR! 
npm
ERR!
npm ERR!
If you need help, you may report this error at:
npm
ERR! <https://github.com/npm/npm/issues>

npm ERR! Please include the following file with any support request:
npm
ERR! /atlasvoyages/npm-debug.log
The command '/bin/sh -c npm install --unsafe-perm=true' returned a non-zero code: 1
ERROR: Job failed: exit status 1