Fix install localhost 502 error

[lapineige]

Install is broken due to erroneous configuration (localhost instead of 127.0.0.1).

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)

[lapineige]

!testme

[yunohost-bot]

:stuck_out_tongue_winking_eye:

[lapineige]

This fixes all install issues on CI and servers #389 #388 #395