refactor(Server): move certificate generation to it's own file

lib/util/createCertificate.js

@@ -0,0 +1,65 @@
+'use strict';
+
+/* eslint-disable
+  space-before-function-paren
+*/
+const selfsigned = require('selfsigned');
+
+function createCertificate (attrs) {
+  return selfsigned.generate(attrs, {
+    algorithm: 'sha256',
+    days: 30,
+    keySize: 2048,
+    extensions: [
+      {
+        name: 'basicConstraints',
+        cA: true
+      },
+      {
+        name: 'keyUsage',
+        keyCertSign: true,
+        digitalSignature: true,
+        nonRepudiation: true,
+        keyEncipherment: true,
+        dataEncipherment: true
+      },
+      {
+        name: 'subjectAltName',
+        altNames: [
+          {
+            // type 2 is DNS
+            type: 2,
+            value: 'localhost'
+          },
+          {
+            type: 2,
+            value: 'localhost.localdomain'
+          },
+          {
+            type: 2,
+            value: 'lvh.me'
+          },
+          {
+            type: 2,
+            value: '*.lvh.me'
+          },
+          {
+            type: 2,
+            value: '[::1]'
+          },
+          {
+            // type 7 is IP
+            type: 7,
+            ip: '127.0.0.1'
+          },
+          {
+            type: 7,
+            ip: 'fe80::1'
+          }
+        ]
+      }
+    ]
+  });
+}
+
+module.exports = createCertificate;