Rename variable and update documentation.

README.md

@@ -1,23 +1,23 @@
 # docker-rotate-backups
 This repository provides a Docker image that implements [`rotate-backups`](https://pypi.org/project/rotate-backups/).
 
-Using this image you are enabled to instantiate container that runs rotate-backups once on a mounted directory where your backups are stored. Afterwards, the container is stopped and, if desired, removed.
+By using this image, you are enabled to instantiate a container that runs rotate-backups once on a mounted directory. In the mounted directory, irrelevant backups are removed and useful are preserved. Afterwards, the container is stopped and, if desired, removed.
 
 ## How to use
-Simply adapt the directory to mount and run the following command in your Docker host:
+Simply adapt the directory to mount and run the following command on your Docker host:
 ```
 docker run --rm \
 -v /path/to/backups:/archive \
 ghcr.io/jan-brinkmann/docker-rotate-backups
 ```
-The default schema to preserve and to remove backups is `--daily=7 --weekly=4 --monthly=12 --yearly=always --dry-run`.
+The default scheme to preserve and to remove backups is `--daily=7 --weekly=4 --monthly=12 --yearly=always --dry-run`.
 
 ## How to customize
-The schema can be customized by means of `ROTATE_BACKUPS_CONFIG`:
+The scheme can be customized by means of `ROTATION_SCHEME`:
 ```
 docker run --rm \
--e ROTATE_BACKUPS_CONFIG="--daily=7 --weekly=4 --monthly=6" \
+-e ROTATION_SCHEME="--daily=7 --weekly=4 --monthly=6" \
 -v /path/to/backups:/archive \
 ghcr.io/jan-brinkmann/docker-rotate-backups
 ```
-For more information on the synthax and the option of the schema, we refer to the [official `rotate-backups` documentation](https://pypi.org/project/rotate-backups/#command-line).
+For more information on the synthax and the options, we refer to the [official `rotate-backups` documentation](https://pypi.org/project/rotate-backups/#command-line).

src/entrypoint.sh

@@ -2,8 +2,8 @@
 
 set -e
 
-if [ -z $ROTATE_BACKUPS_CONFIG ]; then
-  ROTATE_BACKUPS_CONFIG="--daily=7 --weekly=4 --monthly=12 --yearly=always --dry-run"
+if [ -z $ROTATION_SCHEME ]; then
+  ROTATION_SCHEME="--daily=7 --weekly=4 --monthly=12 --yearly=always --dry-run"
 fi
 
-/usr/local/bin/rotate-backups $ROTATE_BACKUPS_CONFIG /archive
+/usr/local/bin/rotate-backups $ROTATION_SCHEME /archive