[https://nodejs.org/en/download/package-manager/#debian-and-ubuntu-based-linux-distributions](https://nodejs.org/en/download/package-manager/#debian-and-ubuntu-based-linux-distributions)
4. Install yarn, and be sure to have [a recent version](https://github.com/yarnpkg/yarn/releases/latest):
[https://yarnpkg.com/en/docs/install#linux-tab](https://yarnpkg.com/en/docs/install#linux-tab)
[https://nodejs.org/en/download/package-manager/#debian-and-ubuntu-based-linux-distributions](https://nodejs.org/en/download/package-manager/#debian-and-ubuntu-based-linux-distributions)
4. Install yarn, and be sure to have [a recent version](https://github.com/yarnpkg/yarn/releases/latest):
[https://yarnpkg.com/en/docs/install#linux-tab](https://yarnpkg.com/en/docs/install#linux-tab)
3. (Optional) Install certbot (choose instructions for your distribution):
[https://certbot.eff.org/all-instructions](https://certbot.eff.org/all-instructions)
3. (Optional) Install certbot (choose instructions for your distribution):
[https://certbot.eff.org/all-instructions](https://certbot.eff.org/all-instructions)