NODE_VERSION was added to potassium using LTS 10.19.0
Changes to generated projects:
.node-version file is added to root.
package.json has engines["node"] attribute for yarn and heroku buildpacks.
This is generated regardless of the value ofget(:front-end) by adding the version directly to assets/package.json and otherwise adding it programmatically using the JSON module.
LuisFros
commented
4 years ago 
NODE_VERSIONwas added to potassium using LTS10.19.0Changes to generated projects:
.node-versionfile is added to root.package.jsonhasengines["node"]attribute for yarn and heroku buildpacks.get(:front-end)by adding the version directly toassets/package.jsonand otherwise adding it programmatically using theJSONmodule.Change to Potassium gem:
.node-versionfile is added to root.Resulting package.json: