README update SODA-pure

README.md

@@ -3,7 +3,7 @@
 is a web-application to access astronomical data stored in FITS-files.
 It implements SODA IVOA recommendation v1.0 (https://ivoa.net/documents/SODA/20170517/index.html).
 
-Docker image is available in this repository and may be launched by the following **compose.yaml**.
+Docker image is available in this repository and may be launched by an **compose.yaml** as in this example:
 
 ```yaml
 version: '3' 
@@ -23,15 +23,19 @@ services:
 
 ```
 
-The above configuaration assumes:
+The port number, ACCESS_CONTEXT_ROOT and directory to FITS-files must be adjusted for the given instance.
+
+The above configuration example assumes:
 
 * 'SKA' project holds FITS-files in sub-directories under: `/srv/ska/surveys`
-* will be accessed remotely by URL: http://<server>/ska/datasets/soda
-* identified by SODA-param ID which is **IVOID** of the form:
-`ID=ivo://<authority>/resource-key?<relative-pathname>#extnum`
+* will be accessed remotely by URL: `http://<server>/ska/datasets/soda`
+* identified by SODA-param ID which is an **IVOID** of the form:
+`ID=ivo://<authority>/<resource-key>?<relative-pathname>#extnum`
 
 Note that the service apends **soda** to ACCESS_CONTEXT_ROOT.
+
 The pathname in the ID is relative to the path in compose.yaml volume-mapping (e.g. '/srv/ska/surveys').
+
 The FITS extension number `#extnum` is optional. Default is the primary HDU.
 
 Data access example: