Updated next config to not need node-sass in production

package.json

@@ -27,7 +27,7 @@
     "format": "prettier --ignore-path .eslintignore --write '**/*.js'",
     "lint": "eslint . --config .eslintrc.json",
     "mocha": "cross-env NODE_ENV=production mocha test/ --recursive --exit",
-    "build": "next build",
+    "build": "cross-env BUILD=true next build",
     "analyze": "cross-env ANALYZE=true next build",
     "dev": "nodemon -w ./src -w ./config -w ./util -w next.config.js --exec 'npm run start:dev'",
     "start:dev": "node src/",
@@ -43,7 +43,6 @@
     "@feathersjs/errors": "^3.3.0",
     "@feathersjs/express": "^1.2.2",
     "@feathersjs/feathers": "^3.1.4",
-    "@zeit/next-sass": "^0.1.2",
     "chokidar": "^2.0.3",
     "codemirror": "^5.37.0",
     "compression": "^1.7.2",
@@ -60,7 +59,6 @@
     "milligram": "^1.3.0",
     "nedb": "^1.8.0",
     "next": "^6.0.0",
-    "node-sass": "^4.8.3",
     "react": "^16.3.2",
     "react-dom": "^16.3.2",
     "react-markdown": "^3.3.0",
@@ -73,10 +71,12 @@
     "winston": "^2.4.1"
   },
   "devDependencies": {
+    "@zeit/next-sass": "^0.2.0",
     "babel-eslint": "^8.2.3",
     "eslint": "^4.19.1",
     "eslint-plugin-react": "^7.8.2",
     "mocha": "^5.1.1",
+    "node-sass": "^4.9.0",
     "nodemon": "^1.17.3",
     "prettier": "^1.13.4",
     "redux-logger": "^3.0.6",