move supervisord call into wrapper script

Dockerfile

@@ -125,6 +125,7 @@ COPY [ \
 	"docker/supervisord.conf", \
 	"docker/docker-entrypoint.sh", \
 	"docker/docker-prepare.sh", \
+	"docker/paperless_cmd.sh", \
 	"docker/wait-for-redis.py", \
 	"docker/management_script.sh", \
 	"docker/install_management_commands.sh", \
@@ -144,6 +145,8 @@ RUN set -eux \
     && chmod 755 /sbin/docker-prepare.sh \
     && mv wait-for-redis.py /sbin/wait-for-redis.py \
     && chmod 755 /sbin/wait-for-redis.py \
+    && mv paperless_cmd.sh /usr/local/bin/paperless_cmd.sh \
+    && chmod 755 /usr/local/bin/paperless_cmd.sh \
   && echo "Installing managment commands" \
     && chmod +x install_management_commands.sh \
     && ./install_management_commands.sh
@@ -222,4 +225,4 @@ ENTRYPOINT ["/sbin/docker-entrypoint.sh"]
 
 EXPOSE 8000
 
-CMD ["/usr/local/bin/supervisord", "-c", "/etc/supervisord.conf"]
+CMD ["/usr/local/bin/paperless_cmd.sh"]

docker/paperless_cmd.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+
+rootless_args=()
+if [ $(id -u) == $(id -u paperless) ]; then
+	rootless_args=(
+		--user
+		paperless
+		--logfile
+		supervisord.log
+		--pidfile
+		supervisord.pid
+	)
+fi
+
+/usr/local/bin/supervisord -c /etc/supervisord.conf ${rootless_args[@]}

docs/setup.rst

@@ -186,8 +186,8 @@ Install Paperless from Docker Hub
 
     **Rootless**
 
-    If you want to run Paperless as a rootless container, you will need to add the
-    following to your ``docker-compose.yml``:
+    If you want to run Paperless as a rootless container, you will need to do the
+    following in your ``docker-compose.yml``:
 
     - set the ``user`` running the container to map to the ``paperless`` user in the
       container.
@@ -195,26 +195,13 @@ Install Paperless from Docker Hub
       ``USERMAP_GID`` are set to in the next step.
       See ``USERMAP_UID`` and ``USERMAP_GID`` :ref:`here <configuration-docker>`.
 
-    - override some of the ``supervisord`` defaults by setting the docker ``command``
-      (`see here <https://docs.docker.com/compose/compose-file/#command>`_) to:
-
-    Your ``docker-compose.yml`` entry for Paperless will look something like:
+    Your entry for Paperless should contain something like:
 
      .. code::
 
         webserver:
           image: ghcr.io/paperless-ngx/paperless-ngx:latest
           user: <user_id>
-          command:
-            - "/usr/local/bin/supervisord"
-            - "-c"
-            - "/etc/supervisord.conf"
-            - "--user"
-            - "paperless"
-            - "--logfile"
-            - "supervisord.log"
-            - "--pidfile"
-            - "supervisord.pid"
 
 5.  Modify ``docker-compose.env``, following the comments in the file. The
     most important change is to set ``USERMAP_UID`` and ``USERMAP_GID``