docker: update following name changes:

`backend_e2e` now print properly backend logs

docker/backend-dev/Dockerfile

@@ -0,0 +1,51 @@
+FROM debian:buster-slim
+
+LABEL maintainer="Goffi <tmp_dockerfiles@goffi.org>"
+
+ARG DEBIAN_FRONTEND=noninteractive
+
+RUN apt-get update && apt-get upgrade -y && \
+    apt-get install -y --no-install-recommends locales python3-dev python3-venv python3-wheel mercurial libxml2-dev libxslt-dev libcairo2-dev libjpeg-dev libgirepository1.0-dev libdbus-1-dev libdbus-glib-1-dev dbus-x11 cmake && \
+    \
+    # will be used to put many SàT specific data
+    mkdir -p /usr/share/libervia/certificates && \
+    addgroup tls-cert --gid 9999 && \
+    chown :tls-cert /usr/share/libervia/certificates && \
+    chmod 2770 /usr/share/libervia/certificates && \
+    # it's better to have a dedicated user
+    useradd -m libervia && adduser libervia tls-cert && \
+    # we'll put all source there to have an easy mount point
+    mkdir /src && chown libervia:libervia /src && \
+    \
+    # we need UTF-8 locale
+    sed -i "s/# en_US.UTF-8/en_US.UTF-8/" /etc/locale.gen && locale-gen && \
+    \
+    # we need a TCP socket for D-Bus
+    sed -i "s&<listen>unix:tmpdir=/tmp</listen>&\0\n  <listen>tcp:host=localhost,bind=*,port=55555,family=ipv4</listen>\n  <auth>ANONYMOUS</auth>\n  <allow_anonymous/>&" /usr/share/dbus-1/session.conf
+
+ENV LC_ALL en_US.UTF-8
+
+WORKDIR /home/libervia
+USER libervia
+
+RUN python3 -m venv libervia_env && libervia_env/bin/pip install -U pip wheel && cd /src && \
+    # We install thoses packages in editable mode, so we can replace them easily with volumes.
+    # We need to move *.egg-info (generated by pip) out of src dirs, otherwise mounting
+    # local repos without it them cause troubles
+    hg clone https://repos.goffi.org/urwid-satext && ~/libervia_env/bin/pip install -e urwid-satext && \
+    mv urwid-satext/urwid_satext.egg-info ~/libervia_env/lib/python3.*/site-packages && \
+    hg clone https://repos.goffi.org/sat_tmp && ~/libervia_env/bin/pip install -e sat_tmp && \
+    mv sat_tmp/sat_tmp.egg-info ~/libervia_env/lib/python3.*/site-packages && \
+    hg clone https://repos.goffi.org/sat_templates && ~/libervia_env/bin/pip install -e sat_templates && \
+    mv sat_templates/sat_templates.egg-info ~/libervia_env/lib/python3.*/site-packages && \
+    hg clone https://repos.goffi.org/sat_media && \
+    hg clone https://repos.goffi.org/sat && ~/libervia_env/bin/pip install -e 'sat[SVG]' && \
+    mv sat/sat.egg-info ~/libervia_env/lib/python3.*/site-packages
+
+ENV DBUS_SESSION_BUS_ADDRESS=tcp:host=backend,port=55555,family=ipv4
+ENV PATH=/home/libervia/libervia_env/bin:$PATH
+
+COPY --chown=root:root libervia.conf /etc/_libervia.conf
+COPY --chown=libervia:libervia scripts/entrypoint.sh /home/libervia/
+
+ENTRYPOINT ["/home/libervia/entrypoint.sh"]

docker/backend-dev/libervia.conf

@@ -0,0 +1,6 @@
+[DEFAULT]
+media_dir = /src/sat_media
+
+[cli]
+# FIXME: default "auto" value cause trouble
+background = dark

docker/backend-dev/scripts/entrypoint.sh

@@ -0,0 +1,19 @@
+#!/bin/sh
+
+eval $(dbus-launch --sh-syntax)
+
+# default, backend is launched in foreground
+if [ $# -eq 0 ]
+then
+	exec libervia-backend fg
+fi
+
+# backend is launched with an explicit subcommand
+if [ $1 = fg -o $1 = bg -o $1 = debug -o $1 = stop -o $1 = status ]
+then
+	exec libervia-backend "$@"
+fi
+
+# a whole command is specified
+libervia-backend bg
+exec "$@"