Codigo

routes.js

const express = require("express");
const multer = require("multer");
const uploadConfig = require("./config/upload");

const SessionController = require("./controllers/SessionController");
const SpotController = require("./controllers/SpotController");

const routes = express.Router();
const upload = multer(uploadConfig);

routes.post("/sessions", SessionController.store);

routes.post("/spots", upload.single("thumbnail"), SpotController.store);

module.exports = routes;

server.js

const express = require("express");
const mongoose = require("mongoose");
const routes = require("./routes");

const app = express();

mongoose.connect(
  "mongodb+srv://ademir:ademir@aircnc-j47qf.mongodb.net/aircnc?retryWrites=true&w=majority",
  {
    useNewUrlParser: true,
    useUnifiedTopology: true
  }
);
// GET, POST, DELETE, PUT

//req.querry = Acessar querry params (para filtros)
//req.params = Acessar route params (para edição, delete)
//req.body   = Acessar corpo da requisição (Para criação, ediçao)

app.use(express.json());
app.use(routes);

app.listen(8080);

upload.js

const multer = require("multer");
const path = require("path");
module.exports = {
  Storage: multer.diskStorage({
    destination: path.resolve(__dirname, "..", "..", "uploads"),
    filename: (req, file, cb) => {
      const ext = path.extname(file.originalname);
      const name = path.basename(file.originalname, ext);

      cb(null, `${name}-${Date.now()}${ext}`);
    }
  })
};