readme update.

README.md

@@ -2,13 +2,15 @@
 
 contains:
 
-- set of nix expressions to package argo (`pkgs`,`lib`)
+- set of [Nix](https://nixos.org/nix/) expressions to package argo (`pkgs`,`lib`)
 
 - gitlab ci files, wich are imported in turn by other repositories (`gitlab-ci`)
 
-- nixos configuratoin for deploying gitlab runners (`deployments`,`modules`)
+- nrm integration test dhall configuration for [dhrun](https://github.com/freuk/dhrun) (`dhrun`)
 
-these things are maintained, the master branch is a rolling dependency for ci. 
+- nixos configuratin for deploying gitlab runners for [nixOps](https://nixos.org/nixops/) (`deployments`,`modules`)
+
+the first three items are maintained on the master branch and constitute a rolling dependency for continuous integration. 
 
 ## setup
 
@@ -22,15 +24,3 @@ package install via an attribute name from `pkgs/default.nix`:
 ```{.bash}
 nix-env -f argopkgs="https://xgitlab.cels.anl.gov/argo/argopkgs/-/archive/master/argopkgs-master.tar.gz" -iA <attribute name>
 ```
-
-## structure
-
-- `pkgs`: nix packages for argo components, applications, internal tools.
-
-- `lib`: some supporting nix expressions
-
-- `deployments`, `modules`: nixops CI server deployment related code.
-
-- `.gitlab-ci.yml`: CI file.
-
-- `dhrun`: dhrun async execution files for nrm tests (used by gitlab-ci)