Disable umami and next.js telemetry.

[orhtej2]

Problem

• Umami is publishing telemetry.

Solution

• Disable telemetry for both umami and next.js

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)

[orhtej2]

!testme

[yunohost-bot]

May the CI gods be with you!

[ericgaspar]

is the .env setting not enough?

[orhtej2]

is the .env setting not enough?

DISABLE_TELEMETRY is umami setting, NEXT_TELEMETRY_DISABLED is next.js setting.

[orhtej2]

(and judging from Dockerfile next.js publishes some telemetry during build as well)