Add user in the image and not container. (#51)

web/Dockerfile

@@ -8,9 +8,8 @@ RUN apt-get update \
     && apt-get install -y --no-install-recommends ruby-sass \
                        wget \
                        postgresql-client \
-    && rm -rf /var/lib/apt/lists/*
-
-RUN python -m pip install -U mailmanclient==3.1.0 \
+    && rm -rf /var/lib/apt/lists/* \
+    && python -m pip install -U mailmanclient==3.1.0 \
                              postorius==1.1.0 \
                              hyperkitty==1.1.0 \
                              django-mailman3==1.1.0 \
@@ -23,6 +22,8 @@ RUN python -m pip install -U mailmanclient==3.1.0 \
 
 ADD mailman-web /opt/mailman-web
 
+RUN useradd -M -U -u 1000 mailman
+
 ADD assets/run.sh /opt/run.sh
 
 WORKDIR /opt/mailman-web

web/assets/run.sh

@@ -91,7 +91,6 @@ python manage.py migrate
 
 # Create a mailman user with the specific UID and GID and do not create home
 # directory for it. Also chown the logs directory to write the files.
-useradd -M -U -u 1000 mailman
 chown mailman:mailman /opt/mailman-web-data -R