Fix running dev openedx image with sudo

When running with `sudo`, the USERID image ARG is 0. The docker
entrypoint needed to take this case into account.

See:
https://discuss.overhang.io/t/openedx-is-not-the-name-of-a-known-user/224/5

CHANGELOG.md

@@ -4,6 +4,7 @@ Note: Breaking changes between versions are indicated by "💥".
 
 ## Unreleased
 
+- [Bugfix] Fix running dev image with `sudo`
 - [Improvement] Add `cms/lms-env-features` patches (#276)
 - [Feature] Add plugin subcommands
 - 💥[Improvement] Move ``-r/--root`` option to parent command level

tutor/templates/build/openedx-dev/bin/docker-entrypoint.sh

@@ -1,10 +1,16 @@
 #!/bin/sh -e
 export DJANGO_SETTINGS_MODULE=$SERVICE_VARIANT.envs.$SETTINGS
 
-# Change file permissions of mounted volumes
-echo "Setting file permissions..."
-find /openedx -not -path "/openedx/edx-platform/*" -not -user openedx -exec chown openedx:openedx {} \+
-echo "File permissions set."
+if id -u openedx > /dev/null 2>&1; then
+    # Change file permissions of mounted volumes
+    echo "Setting file permissions for user openedx..."
+    find /openedx -not -path "/openedx/edx-platform/*" -not -user openedx -exec chown openedx:openedx {} \+
+    echo "File permissions set."
+    
+    # Run CMD as user openedx
+    exec chroot --userspec="$openedx:openedx" --skip-chdir / env HOME=/openedx "$@"
+else
+    echo "Running openedx-dev as root user"
+    exec "$@"
+fi
 
-# Run CMD as user openedx
-exec chroot --userspec="$openedx:openedx" --skip-chdir / env HOME=/openedx "$@"