Add readme note about one-time runs

Author: thespad

README.md

@@ -64,6 +64,8 @@ There is a [walkthrough](https://github.com/meisnate12/Plex-Meta-Manager/wiki/Do
 
 This image supports all of the environment variables listed [here](https://github.com/meisnate12/Plex-Meta-Manager/wiki/Run-Commands-&-Environmental-Variables)
 
+To perform a one-time run use `docker run` (or `docker-compose run`) with the `--rm` and `-e PMM_RUN=True` arguments. This will cause the container to process your config immediately instead of waiting for the scheduled time, and delete the old container after completion.
+
 For more information see the [official wiki](https://github.com/meisnate12/Plex-Meta-Manager/wiki).
 
 ## Usage

readme-vars.yml

@@ -52,6 +52,8 @@ app_setup_block: |
 
   This image supports all of the environment variables listed [here](https://github.com/meisnate12/Plex-Meta-Manager/wiki/Run-Commands-&-Environmental-Variables)
 
+  To perform a one-time run use `docker run` (or `docker-compose run`) with the `--rm` and `-e PMM_RUN=True` arguments. This will cause the container to process your config immediately instead of waiting for the scheduled time, and delete the old container after completion.
+
   For more information see the [official wiki](https://github.com/meisnate12/Plex-Meta-Manager/wiki).
 
 # changelog