module thew error

module.js:340
throw err;
^
Error: Cannot find module '/var/www/html/angular-express-mongoose-seed/app.js'
at Function.Module._resolveFilename (module.js:338:15)
at Function.Module._load (module.js:280:25)
at Function.Module.runMain (module.js:497:10)
at startup (node.js:119:16)
at node.js:935:3

Start by checking how the application entry point is invoked and whether app.js exists at the reported path. The issue is resolved when starting the application no longer produces the Cannot find module error for app.js.

Written by the indexing model from the issue text.