npm start script

package-lock.json

@@ -1841,6 +1841,31 @@
         "sha.js": "^2.4.8"
       }
     },
+    "cross-env": {
+      "version": "5.2.0",
+      "resolved": "https://registry.npmjs.org/cross-env/-/cross-env-5.2.0.tgz",
+      "integrity": "sha512-jtdNFfFW1hB7sMhr/H6rW1Z45LFqyI431m3qU6bFXcQ3Eh7LtBuG3h74o7ohHZ3crrRkkqHlo4jYHFPcjroANg==",
+      "dev": true,
+      "requires": {
+        "cross-spawn": "^6.0.5",
+        "is-windows": "^1.0.0"
+      },
+      "dependencies": {
+        "cross-spawn": {
+          "version": "6.0.5",
+          "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-6.0.5.tgz",
+          "integrity": "sha512-eTVLrBSt7fjbDygz805pMnstIs2VTBNkRm0qxZd+M7A5XDdxVRWO5MxGBXZhjY4cqLYLdtrGqRf8mBPmzwSpWQ==",
+          "dev": true,
+          "requires": {
+            "nice-try": "^1.0.4",
+            "path-key": "^2.0.1",
+            "semver": "^5.5.0",
+            "shebang-command": "^1.2.0",
+            "which": "^1.2.9"
+          }
+        }
+      }
+    },
     "cross-spawn": {
       "version": "5.1.0",
       "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-5.1.0.tgz",
@@ -6887,6 +6912,12 @@
       "integrity": "sha1-yobR/ogoFpsBICCOPchCS524NCw=",
       "dev": true
     },
+    "nice-try": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/nice-try/-/nice-try-1.0.4.tgz",
+      "integrity": "sha512-2NpiFHqC87y/zFke0fC0spBXL3bBsoh/p5H1EFhshxjCR5+0g2d6BiXbUFz9v1sAcxsk2htp2eQnNIci2dIYcA==",
+      "dev": true
+    },
     "no-case": {
       "version": "2.3.2",
       "resolved": "https://registry.npmjs.org/no-case/-/no-case-2.3.2.tgz",