added how to use

Author: cruxcode

README.md

@@ -1 +1,19 @@
 # Atri-Labs/portfolio-templates
+
+## How to use?
+
+### Setup
+```shell
+git clone https://github.com/Atri-Labs/portfolio-template.git
+
+cd portfolio-template
+
+pipenv install
+```
+
+### Start the editor
+```shell
+pipenv shell
+
+atri start
+```