diff --git a/README.md b/README.md
index b2eb082268e4fb406a66cac52124c04647870512..589d37bded5ec9a02d46187a953622880cab929f 100644
--- a/README.md
+++ b/README.md
@@ -20,18 +20,18 @@ curl --get http://localhost:8004/vlkb/datasets/availability
 - **availability** is a [VOSI](https://ivoa.net/documents/VOSI/20170524/REC-VOSI-1.1.html) end-point and returns information whether the service is active
 - **capabilities** is a [VOSI](https://ivoa.net/documents/VOSI/20170524/REC-VOSI-1.1.html) end-point which describes service' functions and paramters
 - **sync** synchronous end-point provides [SODA](https://ivoa.net/documents/SODA/20170517/index.html) service
-- **async/uws** (optional) asynchronous endpoint [UWS](https://ivoa.net/documents/UWS/20161024/REC-UWS-1.1-20161024.html#ApplicationsOfUWS) which provides *mcutout*: a non-standard service which allows several cuts to be specified in one request by a [Job Description Language](JDL.md). All cuts are returned in one compressed file.
+- **async/uws** (optional) asynchronous [UWS](https://ivoa.net/documents/UWS/20161024/REC-UWS-1.1-20161024.html#ApplicationsOfUWS) endpoint which provides *mcutout*: a non-standard service which allows several cuts to be specified in one request by a [Job Description Language](JDL.md). All cuts are returned in one compressed file.
 
 
 ## Docker image
 
 is available from the gitlab-repository of this project.
 
-SODA-docker's internal mount point for the FITS-files storage is **/srv/datasets** (read-only).
+SODA-docker's internal mount point for the FITS-files storage is **/srv/datasets** (read-only); which is the only mandatory element. The rest of configuration is optional.
 
 SODA-docker's internal mount point which temporarely holds cut files is **/srv/cutouts** (read-write) for **mcutout only**.
 
-Configuration parameters are set by these docker environment variables:
+Configuration parameters, all optional:
 
 | parameter | description  |
 |---------|--------------|