Working, but some cleanup still necessary

docker-entrypoint.sh

@@ -0,0 +1,27 @@
+#!/bin/sh
+
+# Get UID/GID from volume dir
+
+VOLUME_UID=$(stat -c '%u' /crawls)
+VOLUME_GID=$(stat -c '%g' /crawls)
+
+# Get the UID/GID we are running as
+
+MY_UID=$(id -u)
+MY_GID=$(id -g)
+
+# If we aren't running as the owner of the /crawls/ dir then add a new user
+# btrix with the same UID/GID of the /crawls dir and run as that user instead.
+
+if [ "$MY_GID" != "$VOLUME_GID" ] || [ "$MY_UID" != "$VOLUME_UID" ]; then
+    groupadd btrix
+    groupmod -o --gid $VOLUME_GID btrix
+
+    useradd -ms /bin/bash -g $VOLUME_GID btrix
+    usermod -o -u $VOLUME_UID btrix > /dev/null
+
+    su btrix -c '"$@"' -- argv0-ignore "$@"
+else
+    exec "$@"
+fi
+