upload.js

'use strict';

let fs = require('fs')
  , request = require('request')
  ;

let config = JSON.parse(fs.readFileSync('./config.json'));
let access_token = config.access_token;
let folder = config.folder;

let now = new Date();
let today = [now.getFullYear(), ('0' + (now.getMonth() + 1)).slice(-2), ('0' + (now.getDate())).slice(-2)].join('-');

let apiArg = {
  "path": '/' + folder + '/' + today + '/slack.log',
  "mode": "add",
  "autorename": true,
  "mute": false
};

request.post({
  'url': 'https://content.dropboxapi.com/2/files/upload',
  'headers': {
    'Authorization': 'Bearer ' + access_token,
    'Dropbox-API-Arg': JSON.stringify(apiArg),
    'Content-Type': 'application/octet-stream'
  },
  'body': fs.readFileSync('./package.json')
}, function(error, response, body) {
  console.log(error);
  console.log(response);
});