set up my flask api on aws instance

setup.sh

#!/bin/bash

sudo apt-get update
sudo apt-get install python3 python3-pip postgresql postgresql-contrib nginx virtualenv
mkdir ~/cp3
cd  ~/cp3
virtualenv --python=python3 venv
git clone https://github.com/code-sleuth/yummy-recipes-api.git yummy-api
cd yummy-api
touch .env
sudo cat<<EOF > ./.env
source ~/cp3/venv/bin/activate
export FLASK_APP='main_app.py'
export SECRET='i wont tell if you dont'
export APP_SETTINGS='development'
export DATABASE_URL='postgres://postgres:postgres@postgres-instance.c12tfpvxgguu.eu-west-2.rds.amazonaws.com/yummy_api'
export TEST_DB_URL='postgres://code:inetutils@localhost/test_db'
EOF

cd ~/cp3
ls
source ~/cp3/venv/bin/activate
pip install autoenv

sudo cat<<EOF >> ~/.bashrc
# autoenv
source `which activate.sh`
EOF

# nginx
# remove default configuaration rule file
sudo rm /etc/nginx/sites-enabled/default
# create symlink
sudo ln -s /etc/nginx/sites-available/app /etc/nginx/sites-enabled/app
# edit rule
sudo bash -c 'cat > /etc/nginx/sites-available/app <<EOF
server {
        location / {
                proxy_pass http://127.0.0.1:8000;
        }
}
EOF'

# restart nginx server
sudo /etc/init.d/nginx start
sudo /etc/init.d/nginx restart

source ~/.bashrc
cd ~/cp3/yummy-api
pip3 install -r requirements.txt
gunicorn main_app:app