尝试呈现ejs时出现错误404

Question

尝试呈现ejs时出现错误404。当res.send，router.get（'/'，（req，res，next）=> res.send（'welcome'））时，该文件运行良好。并在页面上显示“欢迎”，但是当我使用res.render（'welcome'）时，出现错误404。我不知道自己在做什么错。我共享了我的app.js文件，路由器文件dashboard.js和我的ejs文件。所有帮助都将受到欢迎

#include <stdio.h>
#include <stdlib.h>
#include <assert.h>

void duplicateArray( const int *p_input_array, int num_input, int **pp_output_array, int *p_num_output )
{
    int i = 0, j = 0;

    // In the most extreme case, the output array must be 2 times larger than
    // the input buffer, so we allocate double the size of the input buffer.
    int *p_output_array = (int*)malloc( num_input * 2 * sizeof(int) );
    assert( p_output_array != NULL );

    while ( i < num_input )
    {
        int num_repetitions;

        int k = p_input_array[i++];

        //count the number of repetitions
        for ( num_repetitions = 0; i < num_input && p_input_array[i] == k; num_repetitions++, i++ );

        if ( num_repetitions == 0 )
        {
            p_output_array[j++] = k;
        }
        else
        {
            for ( int l = 0; l < num_repetitions + 1; l++ )
            {
                p_output_array[j++] = k;
                p_output_array[j++] = k;
            }
        }
    }

    //shrink the array to the actually needed size
    p_output_array = (int*)realloc( p_output_array, j * sizeof(int) );
    assert( p_output_array != NULL );

    *pp_output_array = p_output_array;
    *p_num_output = j;
}

int main()
{
    int arr[] = { 1, 8, 8, 70, 2, 2, 2, 5, 5, 2 };
    int *p;
    int num;

    duplicateArray( arr, sizeof(arr)/sizeof(*arr), &p, &num );

    for ( int i = 0; i < num; i++ ) {
        printf( "%d\n", p[i] );
    }

    free( p );
}

welcome.ejs file

<div class="row mt-5">
    <div class="col-md-6 m-auto">
      <div class="card card-body text-center">
        <h1><i class="fab fa-node-js fa-3x"></i></h1>
        <p>Create an account or login</p>
        <a href="/users/register" class="btn btn-primary btn-block mb-2"
          >Register</a
        >
        <a href="/users/login" class="btn btn-secondary btn-block">Login</a>
      </div>
    </div>
  </div>

dashboard.js

const express = require('express');
const router = express.Router();


router.get('/', (req, res, next) => res.render('welcome'));




module.exports = router;