move backupupload.js to scripts

it is just a sudo helper

src/scripts/backupupload.js

@@ -0,0 +1,54 @@
+#!/bin/bash
+':' //# comment; exec /usr/bin/env node --max_old_space_size=300 "$0" "$@"
+
+// to understand the above hack read http://sambal.org/2014/02/passing-options-node-shebang-line/
+
+'use strict';
+
+if (process.argv[2] === '--check') return console.log('OK');
+
+require('supererror')({ splatchError: true });
+
+var assert = require('assert'),
+    backups = require('./backups.js'),
+    database = require('./database.js'),
+    debug = require('debug')('box:backupupload');
+
+function initialize(callback) {
+    assert.strictEqual(typeof callback, 'function');
+
+    database.initialize(callback);
+}
+
+// Main process starts here
+var backupId = process.argv[2];
+var format = process.argv[3];
+var dataDir = process.argv[4];
+
+debug(`Backing up ${dataDir} to ${backupId}`);
+
+process.on('SIGTERM', function () {
+    process.exit(0);
+});
+
+// this can happen when the backup task is terminated (not box code)
+process.on('disconnect', function () {
+    debug('parent process died');
+    process.exit(0);
+});
+
+initialize(function (error) {
+    if (error) throw error;
+
+    backups.upload(backupId, format, dataDir, (progress) => process.send(progress), function resultHandler(error) {
+        if (error) debug('upload completed with error', error);
+
+        debug('upload completed');
+
+        process.send({ result: error ? error.message : '' });
+
+        // https://nodejs.org/api/process.html are exit codes used by node. apps.js uses the value below
+        // to check apptask crashes
+        process.exit(error ? 50 : 0);
+    });
+});