update README

Author: ahmnouira

README.md

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+# Flask Simple From 
+This is a simple flask register-form application designed to run in multiple ways: 
+
+# Overview
+![index](/img/index.png)
+
+# Running this app
+
+This app is designed to run in different ways:
+1. As a standalone app running on your machine
+
+## 1. As a standalone app
+
+1. install [python](https://www.python.org/) 
+2. `git clone` the project then `cd` into the directory
+3. run `virtualenv -p /usr/bin/python3 venv`or `python -m venv venv` to create a virtual environment
+4. activate it using `source venv/bin/activate`
+5. `pip install -r requirements/dev.txt` to install the app libaries and it dependencies
+
+### running the app
+
+* After installing, you need to set your application _environment variable_ by running `export FLASK_APP=app.py`
+* run the server using `flask run --reload --debugger`
+* Access the running app in a browser at the URL written to the console (most likely http://localhost:5000)
+ 

app.py

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+from app import app
+
+
+if __name__ == '__main__':
+    app.run(debug=True)

img/index.png

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+Click==7.0
+Flask==1.1.1
+itsdangerous==1.1.0
+Jinja2==2.10.1
+MarkupSafe==1.1.1
+Werkzeug==0.15.5