add readme file

README.md

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+
+---
+# Python Flask Template 2023
+
+The purpose of this project is to use to play around. It uses pipenv, flask and has its own requirements.txt
+
+## Clone this repo
+
+- with an empty folder
+- open terminal
+- please install git before you continue
+- write: ```git clone https://github.com/baylagas/python-flask-template-2023.git``` then press enter
+
+## Install pipenv
+
+```bash
+pip install pipenv --user
+```
+
+## Create a new virtual environment
+
+```bash
+pipenv shell
+```
+
+## Install requirements
+
+```bash
+pipenv install -r requirements.txt
+```
+
+## Run the project
+
+```bash
+python app.py
+```
+
+## Usage: play around with your code
+
+```py
+from flask import Flask
+
+app = Flask(__name__)
+
+
+@app.route("/")
+def hello():
+    return "hello world"
+
+
+if __name__ == "__main__":
+    app.run(debug=True)
+```