Failure when attempting to deploy Egghead.io Redux course code to now.sh

now.txt

> > redux-course@0.1.0 build /home/nowuser/src
> > react-scripts build
> Creating an optimized production build...
> Compiled successfully.
> File sizes after gzip:
>   57.9 KB  build/static/js/main.73d14002.js
>   522 B    build/static/css/main.6a72b013.css
> The project was built assuming it is hosted at the server root.
> To override this, specify the homepage in your package.json.
> For example, add this to build it for GitHub Pages:
>   "homepage" : "http://myname.github.io/myapp",
> The build folder is ready to be deployed.
> You may serve it with a static server:
>   yarn global add serve
>   serve -s build
> ▲ npm start
> npm WARN lifecycle The node binary used for scripts is /home/nowuser/bin/node but npm is using /usr/bin/node itself. Use the `--scripts-prepend-node-path` option to include the path for the node binary npm was executed with.
> > redux-course@0.1.0 start /home/nowuser/src
> > json-server --static ./build db.json
>   \{^_^}/ hi!
>   Oops, db.json doesn't seem to exist
>   Creating db.json with some default data
> fs.js:653
>   return binding.open(pathModule._makeLong(path), stringToFlags(flags), mode);
>                  ^
> Error: EACCES: permission denied, open 'db.json'
>     at Object.fs.openSync (fs.js:653:18)
>     at Object.fs.writeFileSync (fs.js:1300:33)
>     at start (/home/nowuser/src/node_modules/json-server/lib/cli/run.js:116:10)
>     at module.exports (/home/nowuser/src/node_modules/json-server/lib/cli/run.js:159:3)
>     at module.exports (/home/nowuser/src/node_modules/json-server/lib/cli/index.js:81:3)
>     at Object.<anonymous> (/home/nowuser/src/node_modules/json-server/lib/cli/bin.js:3:14)
>     at Module._compile (module.js:624:30)
>     at Object.Module._extensions..js (module.js:635:10)
>     at Module.load (module.js:545:32)
>     at tryModuleLoad (module.js:508:12)
> npm ERR! code ELIFECYCLE
> npm ERR! errno 1
> npm ERR! redux-course@0.1.0 start: `json-server --static ./build db.json`
> npm ERR! Exit status 1
> npm ERR! 
> npm ERR! Failed at the redux-course@0.1.0 start script.
> npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
> npm ERR! A complete log of this run can be found in:
> npm ERR!     /home/nowuser/.npm/_logs/2017-10-27T07_46_33_703Z-debug.log
> No open port found. Make sure 'npm start' creates an HTTP server on a port (any).