Swtich to a npm build rather than npm start

[dylanmcreynolds]

This image is serving the react app from the node server. This is not for production and should only be used in development.

view_tomography_recon_app/react/Dockerfile

Line 52 in 48b393b

CMD ["npm", "run", "dev", "--", "--host", "0.0.0.0", "--port", "5174"]

This should be changed to an image that builds the app through npm run build and serves it over nginx.

See this as an example of this method: https://github.com/als-computing/ArroyoXPS/blob/main/Dockerfile_frontend. Note that it uses build stages, too.