added installation procedure

README.md

+# create-prog-app
+
+## Install procedure
+
+### Clone the repo
+```sh 
+$ git clone ssh://git@ssh.hesge.ch:10572/iliya.saroukha/create-prog-app.git
+```
+
+### cd into project
+```sh
+$ cd create-prog-app
+```
+
+### add executable to PATH
+```sh
+$ cargo install --path .
+```