how to install pip3 -r requirements.txt in a bash file

[MJ-One]

sudo pip3 install virtualenv cd /home/ec2-user/app virtualenv environment source environment/bin/activate sudo pip3 freeze > requirements.txt sudo pip3 install -r requirements.txt

this is the code i have written in a bash file and i get the error like no file names requirements.txt found. What should i do?