Merge #2364

2364: Update Dockerfile r=mergify[bot] a=twekkel

apt is intended for interactive usage, for scripts use apt-get (https://manpages.debian.org/bullseye/apt/apt.8.en.html) to avoid warnings.

## What type of PR?

minor enhancement

## What does this PR do?

replace apt with apt-get to avoid below warning

WARNING: apt does not have a stable CLI interface. Use with caution in scripts.


## Prerequisites

-

Co-authored-by: Eddy Vervest <57325478+twekkel@users.noreply.github.com>

webmails/roundcube/Dockerfile

@@ -13,9 +13,9 @@ ENV TZ Etc/UTC
 LABEL version=$VERSION
 
 RUN set -eu \
- && apt update \
+ && apt-get update \
  && echo 'debconf debconf/frontend select Noninteractive' | debconf-set-selections \
- && apt install -y --no-install-recommends \
+ && apt-get install -y --no-install-recommends \
       python3 curl python3-pip git python3-multidict \
       python3-jinja2 gpg gpg-agent tzdata \
  && pip3 install socrate \
@@ -24,7 +24,7 @@ RUN set -eu \
  && sed -i 's,CustomLog.*combined$,\0 "'"expr=!(%{HTTP_USER_AGENT}=='health'\&\&(-R '127.0.0.1/8' || -R '::1'))"'",' /etc/apache2/sites-available/000-default.conf \
 \
  && mark="$(apt-mark showmanual)" \
- && apt install -y --no-install-recommends \
+ && apt-get install -y --no-install-recommends \
       libfreetype6-dev libicu-dev libjpeg62-turbo-dev libldap2-dev libmagickwand-dev \
       libpng-dev libpq-dev libsqlite3-dev libzip-dev libpspell-dev libonig-dev \
  && ln -s php.ini-production /usr/local/etc/php/php.ini \