Add doc and add missing import

ConfigurationSystem/Client/Helpers/RESTConf.py

@@ -5,6 +5,7 @@
 from DIRAC import S_OK, S_ERROR, rootPath
 from DIRAC.ConfigurationSystem.Client.Config import gConfig
 from DIRAC.Core.Security import Locations, X509Chain
+import tempfile
 
 gBaseSection = "/REST"
 

docs/poorsManDoc.rst

@@ -0,0 +1,11 @@
+You need to:
+
+* add `REST` to the list of Extensions `/DIRAC/Extensions`
+* Create a new section `REST` in which you add `CodeAuthURL=Something`
+* In `/DIRAC/Setups/<yoursetup>`, add a config for `REST`
+* In the `Systems` section, add a `REST` section in which you put what is in the `RESTDIRAC/RESTSystem/ConfigTemplate.cfg` file, and define the OATokenDB
+
+Even if you do not want to use OAuth, it is all mandatory.
+
+Start the server with `python RESTDIRAC/RESTSystem/scripts/dirac-rest-server.py`.
+By default it listen to port 9910