Update README.md

[nomore1007]

The command will not work unless ran as sudo. I figured it out after attempts to set up a server.

Problem

• Command fails, sudo is assumed in documentation

Solution

• add 'sudo' at the beginning

PR Status

• [x] Code finished and ready to be reviewed/tested
• [x] The fix/enhancement were manually tested (if applicable)

Automatic tests

Automatic tests can be triggered on https://ci-apps-dev.yunohost.org/ after creating the PR, by commenting "!testme", "!gogogadgetoci" or "By the power of systemd, I invoke The Great App CI to test this Pull Request!". (N.B. : for this to work you need to be a member of the Yunohost-Apps organization)

[Josue-T]

Hello,

Thanks for the PR. Please do the change in the /doc folder. This file as described on the top is auto generated.