Update useful links page and add keywords and description

Author: bigprof

pages/useful-links.md

@@ -2,15 +2,15 @@
 title: Useful links
 linkTitle: Useful links
 slug: help/useful-links
+keywords: test environment, Xampp, web server, MySQL, PHP, FTP client, FileZilla, upload feature, AppGini upload feature, online course, customizing AppGini applications, hosting providers, Digital Ocean, Bluehost, Docker, Docker container, code management, CVS software, TortoiseGit, HTML reference, CSS reference, Bootstrap 3 reference, jQuery API reference, PHP reference, MySQL SQL reference
+description: Useful links for AppGini users, including setting up a test environment, uploading generated code, online course on customizing AppGini applications, hosting providers, running AppGini apps in Docker, code management, and reference material.
 ---
 
 # Useful links
 
+## Setting up a test environment for your web applications
 
-
-### Setting up a test environment for your web applications
-
-You can test your AppGini-generated web applications on a local machine
+You can test your AppGini-generated web applications on a *local* machine
 before deploying them online. To do so, you need to install a [web
 server](http://httpd.apache.org/download.cgi) ,
 [MySQL](http://dev.mysql.com/downloads/) , and
@@ -23,24 +23,41 @@ download that takes care of all the necessary work in one shot.
 **Note:** All of the above tools are free and open source software.
 
 
-### Uploading the generated code to your server
+## Uploading the generated code to your server
+
+### Uploading using an FTP client *(NOT recommended)*
+
+To upload the generated code to your server, you could use an FTP
+client, for example
+[FileZilla](https://filezilla-project.org/download.php). However,
+this could cause problems if you're not super careful. For example, you
+might accidentally overwrite your server-side configuration files, or
+you might upload files to the wrong directory structure. In addition,
+AppGini  creates many files and directories. But many of them are
+unchanged from one generation to another. So, you might end up
+unnecessarily uploading many files that are already on the server.
 
-To upload the generated code to your server, you should use an FTP
-client. A very powerful program is
-[FileZilla](https://filezilla-project.org/download.php) .
+### Uploading using AppGini upload feature *(RECOMMENDED)*
 
+As of AppGini 23.10, you can use the [built-in upload feature](application-uploader.md) to upload
+your generated code to your server. This feature is much safer and more
+efficient than using an FTP client. It only uploads the files that have
+changed since the last generation, and it doesn't overwrite your
+server-side configuration files. All you need to do to upload your code
+is to click the `Upload` button, and AppGini will take care of the rest.
 
-### Our online course on customizing AppGini applications
+
+## Our online course on customizing AppGini applications
 
 We prepared a course for power users of AppGini, who'd like to add more
 functionality to their applications by writing custom code. Through 4.5
 hours of video, you'll finish 30 practical examples, featuring more than
 500 lines of code, that cover the most common hook questions we receive
 from users. [Preview the
-course](https://www.udemy.com/course/customizing-appgini-web-applications/?referralCode=CCDB276736BE1ADE99B9).
+course](https://bigrof.com/appgini/udemy-customization-course).
 
 
-### Hosting providers
+## Hosting providers
 
 Most hosting providers support hosting the applications generated by
 AppGini out-of-the-box, since AppGini generates PHP applications that
@@ -67,7 +84,16 @@ A good source of information regarding hosting providers is the
 [webhostingtalk forum](https://www.webhostingtalk.com/) .
 
 
-### Code management
+## Running AppGini apps inside a Docker container
+
+Docker is a great way to run your AppGini applications in a containerized
+environment. This way, you can easily move your applications between
+different servers, and you can run multiple applications on the same
+server without worrying about conflicts between them. Check out our
+[guide template for running AppGini apps in Docker](https://github.com/bigprof-software/appgini-on-docker).
+
+
+## Code management
 
 If you plan to manually edit the generated code, you should be careful
 to avoid overwriting your modifications in case you regenerate the code
@@ -76,11 +102,10 @@ code. It makes it very easy to undo (revert) harmful changes, and merge
 your modifications into newly generated code. One such great, easy and
 free program is [TortoiseGit](https://tortoisegit.org/) . We have a
 [tutorial on how to use it with AppGini
-code](/appgini/screencasts/how-to-use-git-with-appgini-to-manage-code-changes)
-.
+code](/appgini/screencasts/how-to-use-git-with-appgini-to-manage-code-changes).
 
 
-### Reference material
+## Reference material
 
 -   [HTML
     reference](https://developer.mozilla.org/en-US/docs/Web/Guide/HTML/HTML5)