fix: Use npm-run-all to run the develop command

tools/scripts/start-develop.js

@@ -1,42 +0,0 @@
-const path = require('path');
-require('dotenv').config({ path: path.resolve(__dirname, '../../.env') });
-
-const { spawn } = require('child_process');
-const kill = require('tree-kill');
-
-const spawnOpts = {
-  stdio: 'inherit',
-  shell: true
-};
-
-const loopback = spawn(
-  'cd',
-  ['./api-server', '&&', 'node development-entry.js'],
-  spawnOpts
-);
-const gatsby = spawn('cd', ['./client', '&&', 'npm run develop'], spawnOpts);
-
-let cleanupCalled = false;
-function cleanUp() {
-  if (cleanupCalled) {
-    return null;
-  }
-  cleanupCalled = true;
-  console.log(`
-  Killing processes...
-  `);
-  const promises = [
-    kill(loopback.pid, 'SIGINT', () => Promise.resolve()),
-    kill(gatsby.pid, 'SIGINT', () => Promise.resolve())
-  ];
-  return Promise.all(promises).then(() => {
-    console.log(`
-    All processes have exited
-  `);
-  });
-}
-
-process.on('exit', cleanUp);
-process.on('SIGINT', cleanUp);
-process.on('SIGUSR1', cleanUp);
-process.on('SIGUSR2', cleanUp);