We are currently using Node 8.11 in production.
package.json"dependencies": {"@mapbox/vector-tile": "^1.3.1","@turf/turf": "^5.1.6","bcrypt-nodejs": "0.0.3","chart.js": "^2.7.3","chartjs": "^0.3.24","d3": "^5.7.0","dotenv": "^6.0.0","fastify": "^1.12.1","fastify-auth": "^0.2.0","fastify-formbody": "^2.0.1","fastify-helmet": "^1.0.3","fastify-jwt": "^0.3.0","fastify-static": "^0.12.0","js-datepicker": "^4.0.6","jsrender": "^0.9.91","leaflet": "^1.3.4","leaflet.vectorgrid": "^1.3.0","mobile-detect": "^1.4.3","nanoid": "^1.2.3","node-fetch": "^2.2.1","nodemailer": "^4.6.8","pg": "^7.5.0","pino-pretty": "^2.2.1","request": "^2.88.0","turf": "^3.0.14","turf-isvalid": "^1.0.0"},"devDependencies": {"eslint": "^4.19.1","husky": "^1.1.3","lint-staged": "^8.0.4","webpack": "^4.20.2","webpack-cli": "^3.1.1"}