[etherpad-web/oscp-backend] Create etherpad user

[Bartłomiej Piotrowski <bpiotrowski src gnome org>]

commit 75cbff4d83cb7dff851e1a0e8f56d49c9a9ad6e7
Author: Bartłomiej Piotrowski <bpiotrowski gnome org>
Date:   Wed May 13 13:15:03 2020 +0200

    Create etherpad user

 Dockerfile         | 16 ++++++++--------
 fix-permissions.sh |  7 -------
 2 files changed, 8 insertions(+), 15 deletions(-)
---
diff --git a/Dockerfile b/Dockerfile
index 18158fe..5c7b063 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -14,6 +14,13 @@ RUN cd /opt && curl -SL \
     > etherpad.zip && unzip etherpad && rm etherpad.zip && \
     mv etherpad-lite-${ETHERPAD_VERSION} etherpad
 
+RUN groupadd etherpad -g 1000180000  && \
+    useradd etherpad -g 1000180000 -u 1000180000 -G etherpad -r -l -M -d /opt/etherpad && \
+    chown -R etherpad:etherpad /opt/etherpad
+
+ADD entrypoint.sh /entrypoint.sh
+
+USER etherpad
 WORKDIR /opt/etherpad
 RUN bin/installDeps.sh && rm settings.json
 
@@ -27,13 +34,6 @@ RUN npm install ep_adminpads \
     ep_copy_paste_select_all \
     ep_copy_paste_images
 
-ADD fix-permissions.sh /fix-permissions.sh
-ADD entrypoint.sh /entrypoint.sh
-
-RUN /fix-permissions.sh /opt/etherpad && \
-    /fix-permissions.sh /.npm
-
-USER 1001 
-
+USER etherpad
 EXPOSE 9001
 ENTRYPOINT ["/entrypoint.sh"]