Sharing the source code with the container lesson

Docker
1

When I tried to run docker run -d -p 5005:3000 -v ${pwd}:/app --name react-app react-application:1 this command to share the source code of the host with the container, I get an error > react-app@0.1.0 start

react-scripts start

sh: 1: react-scripts: not found,
But if I used the same command without the volume it works correctly, what can be the issue ?

2

Indeed I do not understand the 1 in this application:1