Always chown biboumi /var/lib/biboumi when the docker container starts

This fixes permission problems when we bind a volume that is not owned by
the biboumi user.

docker/biboumi/Dockerfile

@@ -35,7 +35,6 @@ RUN git clone git://git.louiz.org/biboumi && mkdir ./biboumi/build && cd ./bibou
 RUN useradd biboumi
 
 RUN mkdir /var/lib/biboumi
-RUN chown -R biboumi:biboumi /var/lib/biboumi
 
 COPY ./biboumi.cfg /etc/biboumi/biboumi.cfg
 RUN chown -R biboumi:biboumi /etc/biboumi
@@ -44,5 +43,3 @@ COPY ./entrypoint.sh /entrypoint.sh
 RUN chmod 755 /entrypoint.sh
 
 ENTRYPOINT ["/entrypoint.sh"]
-
-USER biboumi

docker/biboumi/entrypoint.sh

@@ -5,7 +5,9 @@ sed -i s/BIBOUMI_HOSTNAME/${BIBOUMI_HOSTNAME:-biboumi.localhost}/ /etc/biboumi/b
 sed -i s/BIBOUMI_ADMIN/${BIBOUMI_ADMIN:-}/ /etc/biboumi/biboumi.cfg
 sed -i s/BIBOUMI_PASSWORD/${BIBOUMI_PASSWORD:-missing_password}/ /etc/biboumi/biboumi.cfg
 
+chown -R biboumi:biboumi /var/lib/biboumi
+
 echo "Running biboumi with the following conf: "
 cat /etc/biboumi/biboumi.cfg
 
-/usr/bin/biboumi /etc/biboumi/biboumi.cfg
+runuser -u biboumi /usr/bin/biboumi /etc/biboumi/biboumi.cfg