Add entrypoint for running development worker

docker/start_dev_worker.sh

@@ -0,0 +1,19 @@
+#!/bin/sh
+
+echo "Starting InvenTree worker..."
+
+cd $INVENTREE_SRC_DIR
+
+# Activate virtual environment
+source inventree-docker-dev/bin/activate
+
+sleep 5
+
+# Wait for the database to be ready
+cd $INVENTREE_MNG_DIR
+python manage.py wait_for_db
+
+sleep 10
+
+# Now we can launch the background worker process
+python manage.py qcluster