update README.md

README.md

@@ -15,11 +15,12 @@ keep your media files.
 
 ## Version management
 
-This repository will eventually comprise Dockerfiles for different releases of
+This repository will eventually comprise Dockerfiles for different
+master versions of
 the application. In order to build an image out of a specific version, use the
-respective branch (e.g. `4.1.5`). The Docker image tags correspond to the
-branch names / version numbers, so in order to use the 4.1.5-version of the
-application, pull the image with tag `4.1.5`. The `latest` tag is identical to
+respective branch (e.g. `4.x`). The Docker image tags correspond to the
+branch names / version numbers, so in order to use the 4.x-version of the
+application, pull the image with tag `4.x`. The `latest` tag is identical to
 the last development version, which means reflecting the `develop` branch of
 the Cantaloupe [repository](https://github.com/cantaloupe-project/cantaloupe/)
 as well as of this repository. This latest version in insofar special because
@@ -60,7 +61,7 @@ Notice that some changes can affect the overall working of the container
    providing the argument
 `-v<path_to_your_config>:/home/cantaloupe/app/cantaloupe.properties`
 3. Selectively override properties by setting appropriate environment
-   variables on container startup (`-e<key>:<value>). The key translate to
+   variables on container startup (`-e<key>:<value>). The key translates to
 uppercase letters, `.` being replaced by `_` (e.g. `https.key_store_path` ->
 `HTTPS_KEY_STORE_PATH`).
 
@@ -101,5 +102,5 @@ docker run -d --name cantaloupe \
   -eCACHE_SERVER_DERIVATIVE=RedisCache \
   -eREDISCACHE_HOST=redis \
   -v<path_to_host_image_folder>:/home/cantaloupe/images \
-  cantaloupe:4.1.5
+  cantaloupe:4.x
 ```