[DOCS] add dataset addition instructions (#88)

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 3117563..ebbdb03 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,4 +1,4 @@
-# Update and Commit workflow
+# Update and Commit workflow (Deprecated)
 
 ## Prerequisites
 
diff --git a/README.md b/README.md
index e1f9c77..ff8f3fe 100644
--- a/README.md
+++ b/README.md
@@ -71,3 +71,13 @@
 ```
 
 An example, [PR#83](https://github.com/apache/systemds-website/pull/83).
+
+
+## How to add new dataset
+
+To add a new dataset,
+
+1. create `<dataset-name>.md` file in the [`_src/_datasets`](._src/_datasets) folder.
+2. Upload dataset files to [`_src/assets/datasets/<dataset-name>`](._src/assets/datasets) folder.
+
+And follow the _Updating the website_ procedure.