- [x] Have you signed the [CLA](http://www.ubuntu.com/legal/contributors/)? ----- Adds support for [ExpressJS](https://expressjs.com/) framework. ### Key Decisions - Support for `bare` and `24.04` only. Drop support for 22.04 (jammy) - Jammy comes with an old version of Node which does not support `??` operator commonly used in JS projects. This means that the projects initialized with `express-generator` tooling (assumed to be the case) would not work. - Include runtime slices in the `expressjs-framework/install-app > stage-packages` part. - A separate `expressjs-framework/runtime` exists to cater to apt packages, since slices and apt packages cannot be used together by design. See https://github.com/canonical/rockcraft/issues/785. - Do not include user customizable part for runtime slices/packages in the template - There is an issue with the NPM plugin which conflicts with the `lib` directory of apt/slice installs. Remove the offering until the issue is resolved. See https://github.com/canonical/rockcraft/issues/790. - Provide Ubuntu packaged Node/NPM by default, allow user to specify Node version if desired. - To follow the principles of Ubuntu LTS, by default use the NodeJS and NPM provided by apt/slices but allow users to customize the behavior through overriding the NPM plugin's `npm-include-node` and `npm-node-version` fields. - Include all paths under the `app/` directory. - Users should not include/add paths which are not desired in the `app` path (e.g. .env files)