我有一个mern社交媒体应用程序，用户可以登录，然后采取他们的饲料，他们可以创建职位，他们显示在饲料。一切都在本地主机上工作，但在服务器上，我可以登录并查看提要，甚至可以创建正在保存到数据库中的帖子，但它们不会显示在服务器上的提要上。
这是服务器。js：

const path = require('path');
const express = require('express');
const cors = require('cors');
const fileUpload = require('express-fileupload');
const AuthRoute = require('./routes/AuthRoute.js');
const connectDB = require('./config/db.js');
const colors = require('colors');
const dotenv = require('dotenv');
dotenv.config();

const PostRoute = require('./routes/PostRoute.js');
const UploadRoute = require('./routes/UploadRoute.js');

const PORT = process.env.PORT || 8000;

connectDB();

const app = express();
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cors());

// Serve frontend
if (process.env.NODE_ENV === 'production') {
  app.use(express.static(path.join(__dirname, '../frontend/build')));

  app.get('*', (req, res) =>
    res.sendFile(
      path.resolve(__dirname, '../', 'frontend', 'build', 'index.html')
    )
  );
} else {
  app.get('/', (req, res) => res.send('Please set to production'));
}

app.listen(PORT, () => {
  console.log(`Server is running on port ${PORT}.`.yellow.bold);
});

app.use('/api/auth', AuthRoute);
app.use('/api/posts', PostRoute);
app.use('/api/uploadImages', UploadRoute);

我试过把东西移来移去，但没有任何改变。这是我的PostRoutes：

const express = require('express');
const {
  createPost,
  getTimelinePosts,
  getAllPosts,
} = require('../controllers/PostController.js');
const { authUser } = require('../middleware/auth');

const router = express.Router();
console.log('inside am in the routes');
router.post('/createPost', createPost);
router.get('/:id/timeline', getTimelinePosts);
router.get('/getAllPosts', authUser, getAllPosts);
module.exports = router;

下面是最初被调用的地方，在本地主机上，如果我注解掉除了useEffect之外的所有代码，它会在控制台中显示post数组，但在服务器控制台中显示html文档。
下面是文件：

import { useEffect } from 'react';
import { useDispatch, useSelector } from 'react-redux';
import { getTimeLinePosts } from '../../../actions/postAction';
import Post from '../Post/Post.js';
import PulseLoader from 'react-spinners/FadeLoader';

const Posts = () => {
  const dispatch = useDispatch();
  const { user } = useSelector((state) => state.authReducer.authData);
  const { posts, loading, error } = useSelector((state) => state.postReducer);

  useEffect(() => {
    if (error) {
      console.log(error);
    }
    dispatch(getTimeLinePosts(user._id));
  }, [dispatch, user._id]);

  return (
    <div className="Posts">
      {loading ? (
        <div style={{ display: 'flex', justifyContent: 'center' }}>
          <PulseLoader
            color="#485639"
            height={15}
            width={5}
            loading={loading}
          />
        </div>
      ) : posts ? (
        posts.map((post, i) => (
          <Post key={i} post={post} index={i} user={user} />
        ))
      ) : (
        "You haven't shared anything yet."
      )}
    </div>
  );
};

export default Posts;

这里是postRequest

import axios from 'axios';
//import * as PostsApi from '../api/PostsRequests';

export const getTimeLinePosts = (id) => async (dispatch) => {
  console.log(id);
  const API_URL = '/api/posts/';
  dispatch({ type: 'RETREIVING_START' });
  try {
    //const { data } = await PostsApi.getTimelinePosts(id);
    const { data } = await axios.get(`/api/posts/${id}/timeline`);
    console.log(data);
    dispatch({ type: 'RETREIVING_SUCCESS', data: data });
  } catch (error) {
    dispatch({ type: 'RETREIVING_FAIL' });
    console.log(error);
  }
};

这是邮政减速器

const postReducer = (
  state = { posts: null, loading: false, error: false, uploading: false },
  action
) => {
  switch (action.type) {
    // belongs to PostShare.jsx
    case 'ADDPOST_START':
      return { ...state, error: false, uploading: true };
    case 'ADDPOST_SUCCESS':
      return {
        ...state,
        posts: [action.data, ...state.posts],
        uploading: false,
        error: false,
      };
    case 'ADDPOST_FAIL':
      return { ...state, uploading: false, error: true };
    // belongs to Posts.jsx
    case 'RETREIVING_START':
      return { ...state, loading: true, error: false };
    case 'RETREIVING_SUCCESS':
      return {
        ...state,
        posts: action.data,
        loading: false,
        error: false,
      };
    case 'RETREIVING_FAIL':
      return { ...state, loading: false, error: true };
    default:
      return state;
  }
};

export default postReducer;