Lock files #885
Description
Currently a Fastboot-enabled ember app generates a dist/package.json file programmatically on ember build.
This mostly works well, but it means that an npm install in this dist/ directory is not deterministic and the production SSR server can have different dependencies without any code changes. This can cause difficult-to-reproduce bugs.
It would be useful to find a way for the production Fastboot server to use a lockfile instead.