add a reset tasks cli command

docs/reset-tasks.md

@@ -0,0 +1,33 @@
+# TubeSync
+
+## Advanced usage guide - reset tasks from the command line
+
+This is a new feature in v1.0 of TubeSync and later. It allows you to reset all
+scheduled tasks from the command line as well as the "reset tasks" button in the
+"tasks" tab of the dashboard.
+
+This is useful for TubeSync installations where you may have a lot of media and
+sources added and the "reset tasks" button may take too long to the extent where
+the page times out (with a 502 error or similar issue).
+
+## Requirements
+
+You have added some sources and media
+
+## Steps
+
+### 1. Run the reset tasks command
+
+Execute the following Django command:
+
+`./manage.py reset-tasks`
+
+When deploying TubeSync inside a container, you can execute this with:
+
+`docker exec -ti tubesync python3 /app/manage.py reset-tasks`
+
+This command will log what its doing to the terminal when you run it.
+
+When this is run, new tasks will be immediately created so all your sources will be
+indexed again straight away, any missing information such as thumbnails will be
+redownloaded, etc.