As a consequence:
• Bump minimum supported Python version to 3.7.
• Move Vagrant environment to Debian 10, which has Python 3.7.
• Move CI frontend tests to Debian 10.
• Move production build test to Debian 10.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
The `en_US.UTF-8` locale may not be configured or generated on all
installs; it also requires that the `locales` package be installed.
If users generate the `en_US.UTF-8` locale without adding it to the
permanent set of system locales, the generated `en_US.UTF-8` stops
working when the `locales` package is updated.
Switch to using `C.UTF-8` in all cases, which is guaranteed to be
installed.
Fixes#15819.
Real systemd requires this. docker-systemctl-replacement currently
doesn’t but maybe it will later.
Signed-off-by: Anders Kaseorg <anders@zulipchat.com>
This restores man pages and other documentation that have been
stripped from the default Ubuntu cloud image and installs
ubuntu-minimal and ubuntu-standard.
Signed-off-by: Anders Kaseorg <anders@zulipchat.com>