Unable to start container process: exec: "npm run start" executable file not found in $PATH unknown

I have an application that I have containerized.
This is its Dockefile:

FROM front-end-base:latest
COPY ... /app/...
...
EXPOSE 5000
RUN cd /app
CMD ["npm run start"]

The front-end-base has Node, NPM, Yarn and a few other packages installed.
The dockerfile copies the app's files over, uses yarn to install them from a yarn.lock, exposes the port, and then uses npm to start the application.

However, I get the following error:

"Failed to run image. Error invoking remote method 'docker-run-container' - fail to create task for container: fail to create shim task: OCI runtime create failed: unable to start container process exec: "npm run start": executable file not found in $PATH unknown

My ultimate goal is to get this working in a Docker Dev environment. However, I get the above error from command line, GUI running the image, and from the create Dev Environment process.

However, if I take the final image and instead of trying to run the app just bash into it via

docker run -it fe-test:latest /bin/bash -l

The container starts successfully, and I am able to navigate to the /app directory and executable "npm run start" successfully with no errors.

I have found several other people online asking semi-related questions but the answers have either not worked for me or not been relevant to my situation.

Any help would be appreicated.

I realized the problem shortly after posting.

Due to the way I installed npm/node/yarn (via a brew installation) to applications were not located at /usr/bin/npm but at a home directory under brew.

This is why it was complaining they were not on the path, either directly referencing the full path (which npm), or creating a system link will fix the problem.