Add user precice again to fix dockerfile. See #191.

tools/releasing/packaging/docker/Dockerfile

@@ -16,15 +16,15 @@ RUN apt-get -qq update && apt-get -qq install \
     pkg-config && \
     rm -rf /var/lib/apt/lists/*
 
-## Needed, if base image does not create a user? See also https://github.com/precice/precice/pull/1090
-## At the moment: precice/precice:latest does not create a user, but benjaminrodenberg/precice:develop creates a user
+## Needed, because precice/precice:latest does not create a user? See also https://github.com/precice/precice/pull/1090, https://github.com/precice/python-bindings/issues/191
 ## ------>
 # Create user precice
-# ARG uid=1000
-# ARG gid=1000
-# RUN groupadd -g ${gid} precice \
-#     && useradd -u ${uid} -g ${gid} -m -s /bin/bash precice \
-#     && sudo usermod -a -G sudo precice
+ARG uid=1000
+ARG gid=1000
+RUN groupadd -g ${gid} precice \
+    && useradd -u ${uid} -g ${gid} -m -s /bin/bash precice \
+    && sudo usermod -a -G sudo precice
+## <-----
 
 # Setup passwordless sudo
 RUN echo "ALL            ALL = (ALL) NOPASSWD: ALL" >> /etc/sudoers
@@ -36,7 +36,6 @@ ENV USER=precice
 
 # Use bash instead of default sh
 SHELL ["/bin/bash", "-c"]
-## <-----
 
 # Upgrade pip to newest version (pip version from 18.04 apt-get is outdated)
 RUN python3 -m pip install --user --upgrade pip