front: use npm install --save=false in dev Dockerfile

We don't want to mutate package-lock.json on container startup.
Leave it up to the user to run `npm install` explicitly when
dependencies are updated, just like our other generated files.

Helps with behavioral differences between npm v10 and v11.

`npm clean-install` would work too, but nukes node_modules/ which
makes it more expensive.

Signed-off-by: Simon Ser <[email protected]>

Author: emersion

front/docker/Dockerfile.devel

@@ -21,4 +21,4 @@ ENV NODE_OPTIONS="--max_old_space_size=4096"
 # Start the app
 COPY docker/dev-entrypoint.sh /
 ENTRYPOINT ["/dev-entrypoint.sh"]
-CMD ["sh", "-c", "id && npm install && (npm run build-ui & npm run start-container)"]
+CMD ["sh", "-c", "id && npm install --save=false && (npm run build-ui & npm run start-container)"]