我尝试在CentOS 7中使用Apache部署我的应用程序，但即使应用程序正在运行，域也无法访问它。
当我尝试访问该域时，它显示为Forbidden You don't have permission to access this resource。
请注意，我可以使用ip：port访问网站。
以下是sites-available目录中文件名为example.com.conf的Apache的配置：

<VirtualHost *:80>
        ServerName  example.com
        ProxyRequests On
        ProxyPass / http://server-ip:3000
        ProxyPassReverse / http://server-ip:3000
</VirtualHost>

我还在httpd.conf文件中添加了IncludeOptional sites-enabled/*.conf。
我不习惯CentOS 7，也不习惯Apache，所以我不知道我在这里做错了什么。还要注意的是，该域配置了CloudFlare，我认为该域安装了SSL，正如我在浏览器中看到的那样，它没有说“不安全”。还值得一提的是，服务器主机是带有DirectAdmin的私有云服务器。
===============更新=======================================================================================================================================================================================
这是我尝试后，Alaindeseine建议：

<VirtualHost example.com:80>
        RewriteEngine on
        RewriteCond %{SERVER_PORT} ^80$
        RewriteRule ^.*$ https://%{SERVER_NAME}%{REQUEST_URI} [R=301,L]
</VirtualHost>

<VirtualHost *:443>
        Header always set Strict-Transport-Security "max-age=31536000"

        ServerName example.com

        SetOutputFilter DEFLATE
        SetEnvIfNoCase Request_URI "\.(?:gif|jpe?g|png)$"no-gzip
        AddOutputFilterByType DEFLATE text/html text/plain text/xml text/css text/javascript application/javascript

        ExpiresActive On
        ProxyRequests off
        RequestHeader add original-protocol-ssl 1
        <Proxy *>
                Order deny,allow
                Allow from all
        </Proxy>
        <Location />
                ProxyPass http://ip:3000/
                ProxyPassReverse http://ip:3000/
                ProxyPreserveHost On
        </Location>
        # SSLCertificateFile /etc/letsencrypt/live/xxx.example.com/cert.pem
        # SSLCertificateKeyFile /etc/letsencrypt/live/xxx.example.com/privkey.pem
        # Include /etc/letsencrypt/options-ssl-apache.conf
        # SSLCertificateChainFile /etc/letsencrypt/live/xxx.example.com/chain.pem
</VirtualHost>