Synclounge is not working anymore

[bonny1992]

I suggest switching to the official Synclounge Docker version:

https://github.com/synclounge/synclounge#docker

Here's the error log (if it's necessary):

internal/modules/cjs/loader.js:883
  throw err;
  ^

Error: Cannot find module '/opt/synclounge/webapp.js'
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:880:15)
    at Function.Module._load (internal/modules/cjs/loader.js:725:27)
    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:72:12)
    at internal/main/run_main_module.js:17:47 {
  code: 'MODULE_NOT_FOUND',
  requireStack: []
}
npm ERR! missing script: server
npm ERR!
npm ERR! Did you mean this?
npm ERR!     serve