Add install/run instructions

README.md

@@ -26,3 +26,17 @@ Explain what the website is and how can be used. Two jumbotrons will lead the us
 ## Registration form
 
 A "standard" registration form. Has to have links to statute and rules as HTML, checkboxes to read & accept.
+
+# Install instructions
+Assuming you have `pipenv` and `nodejs`/`npm` already installed, you can install the dependencies needed with the following commands:
+```shell
+pipenv install
+cd frontend
+npm install
+npm run build
+```
+## Running the app
+To start the development server use the following command from the root directory:
+```shell
+FLASK_APP=m_ship pipenv run flask run
+```