Site update and added Feedback page

website/feedback/README.md

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+## PIP not found or zsh issue
+
+```bash
+
+# Will fix zsh not found pipenv on Mac 10.14.6
+sudo -H pip install -U pipenv
+
+Source: https://stackoverflow.com/a/47898336
+```
+
+## Development step
+
+1. Get into pipenv first `pipenv shell`
+2. Install flask `pipenv install flask`
+3. PGSQL database adaptar `pipenv install psycopg2`
+4. PGSQL databse binary `pipenv install psycopg2-binary`
+5. SQLAlchemy `pipenv install flask-sqlalchemy`
+6. HTTP server for heroku `pipenv install gunicorn`
+
+## Publish
+
+```bash
+pip freeze > requirements.txt
+
+# Create the branch on your local machine and switch in this branch :
+git checkout -b heroku
+
+git push heroku heroku
+# List all branch
+git branch -a
+
+```