So that only the required deps to build are installed before
building the docker image.

frontend: Move some deps out of devDependencies because the
build depends on them.

Some dependency updates caused the snapshot changes.

The sagas type updates seem to have a problem with cancelled().

Ignore all the node_modules, app/, and the backend/tools where the
go lint tool lives.

Sending node_modules to the Docker daemon greatly increases the size
of the Docker build context, which makes `make image` take more time.
We don't need to copy node_modules when building an image because we
run `npm install` in the Dockerfile anyway.