Update install - reload nginx after adding nginx conf file

[Thatoo]

This way, nginx is reloaded after adding the nginx conf, not before and it would make federation working right away after install, no need for the installer to restart nginx after install.

Problem

• Description of why you made this PR

Solution

• And how do you fix that problem

PR Status

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

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[ericgaspar]

!testme

[yunohost-bot]

Alrighty!