yarn-error.log

Arguments: 
  /usr/bin/node /usr/share/yarn/bin/yarn.js install

PATH: 
  /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin

Yarn version: 
  1.16.0

Node version: 
  8.11.4

Platform: 
  linux x64

Trace: 
  Error: getaddrinfo EAI_AGAIN registry.yarnpkg.com:443
      at Object._errnoException (util.js:992:11)
      at errnoException (dns.js:55:15)
      at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:92:26)

npm manifest: 
  {
    "name": "graphql-example",
    "version": "1.0.0",
    "description": "",
    "main": "index.js",
    "scripts": {
      "test": "echo \"Error: no test specified\" && exit 1",
      "start": "nodemon app.js"
    },
    "author": "",
    "license": "ISC",
    "dependencies": {
      "bcryptjs": "^2.4.3",
      "body-parser": "^1.18.3",
      "express": "^4.16.4",
      "express-graphql": "^0.7.1",
      "graphql": "^14.2.1",
      "jsonwebtoken": "^8.5.1",
      "mongoose": "^5.5.0"
    },
    "devDependencies": {
      "nodemon": "^1.18.11"
    }
  }

yarn manifest: 
  No manifest

Lockfile: 
  No lockfile