Re-building Cachet in Docker with npm fails due to uglify-js

[christidis]

I have a Dockerfile like the following in order to re-build the application in 2.4 and apply some CSS changes

>cat Dockerfile 
# build stage
FROM cachethq/docker:latest
COPY public/img/login-logo.png /var/www/html/public/img/login-logo.png
COPY resources /var/www/html/resources
USER root
RUN apk add --no-cache npm
USER 1001
RUN mkdir -p /home/www-data/.npm/ && cd /var/www/html && npm install && npm run production

# docker stage
FROM cachethq/docker:latest
RUN rm -fr /var/www/html
COPY --from=0 --chown=1001 /var/www/html /var/www/html
COPY entrypoint.sh /sbin/entrypoint.sh
USER root
RUN apk add --no-cache vim
USER 1001

Lately I have noticed that uglify-js is giving this error.

 DONE  Compiled successfully in 30631ms                                                                                        11:59:51 AM

Whoops! We had trouble minifying "public/dist/js/all.js". Perhaps you need to use mix.babel() instead?

/var/www/html/node_modules/laravel-mix/src/webpackPlugins/CustomTasksPlugin.js:64
                    throw e;
                    ^
SyntaxError: Name expected
    at JS_Parse_Error.get (eval at <anonymous> (/var/www/html/node_modules/uglify-js/tools/node.js:27:1), <anonymous>:86:23)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! cachet@ production: `cross-env NODE_ENV=production node_modules/webpack/bin/webpack.js --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the cachet@ production 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:
npm ERR!     /home/www-data/.npm/_logs/2020-12-22T11_59_51_992Z-debug.log

When I build the image using an older docker image from a previous build from my docker registry, that has node_modules already installed, then the build succeeds. I have verified that the uglify-js is in the same version in both images.

bash-5.0$ npm list uglify-js
cachet@ /var/www/html
`-- laravel-mix@2.1.14
  +-- html-loader@0.4.5
  | `-- html-minifier@3.5.21
  |   `-- uglify-js@3.4.10 
  +-- uglify-js@2.8.29 
  `-- webpack@3.12.0
    `-- uglifyjs-webpack-plugin@0.4.6
      `-- uglify-js@2.8.29  deduped

However, if I diff the two folders (the one created in a new npm install, and the one that was installed in an older image) the actual files differ. So, as a workaround, after npm install I am replacing the node_modules/uglify-js from an older image to the node_modules and the npm run production works without any issues and this was my workaround to the problem.