📝 Add instructions for Hugo Modules installation

README.md

@@ -36,7 +36,28 @@ Congo is designed to be a simple, lightweight theme for [Hugo](https://gohugo.io
 
 This is a simplified set of instructions and assumes a basic understanding of building Hugo sites and installing themes. For detailed instructions, refer to the full [theme documentation](https://jpanther.github.io/congo/docs/).
 
-There are a couple of ways to install the Congo theme into your Hugo website. The git method is the easiest to keep the theme up-to-date, but you can also download and install manually if you don't have git available.
+There are a few ways to install the Congo theme into your Hugo website.
+
+### Install using Hugo
+
+This method is the quickest and easiest for keeping the theme up-to-date. Hugo Modules uses Go to initialise and manage modules so you need to ensure you have Go installed before proceeding.
+
+1. [Download](https://golang.org/dl/) and install Go. You can check if it's already installed by using the command `go version`.
+2. From your Hugo project's directory, initiate the Hugo Modules system for your website:
+
+   ```shell
+   hugo mod init github.com/<username>/<repo-name>
+   ```
+
+3. Add the theme to your configuration by creating a new file `config/_default/module.toml` and adding the following:
+
+   ```toml
+   [[imports]]
+   path = "github.com/jpanther/congo"
+   ```
+
+4. Start your server using `hugo server` and the theme will be downloaded automatically.
+5. Continue to [set up the theme configuration files](#set-up-theme-configuration-files).
 
 ### Install using git
 
@@ -48,15 +69,26 @@ git init
 git submodule add -b stable https://github.com/jpanther/congo.git themes/congo
 ```
 
+Then continue to [set up the theme configuration files](#set-up-theme-configuration-files).
+
 ### Install manually
 
-Download the latest release of the theme from: [https://github.com/jpanther/congo/releases](https://github.com/jpanther/congo/releases)
+Download the latest release of the theme from: [https://github.com/jpanther/congo/releases/latest](https://github.com/jpanther/congo/releases/latest)
 
 Extract the archive, rename the folder to `congo` and move it to the `themes/` directory inside your Hugo project.
 
-### Set up your configuration files
+Then continue to [set up the theme configuration files](#set-up-theme-configuration-files).
 
-In the root folder of your website, delete the `config.toml` file that was generated by Hugo. Copy the entire `config` folder from `themes/congo/config/` into the root of your website. This will ensure you have all the correct theme settings and will enable you to easily customise the theme.
+### Set up theme configuration files
+
+In the root folder of your website, delete the `config.toml` file that was generated by Hugo. Copy the `*.toml` config files from the theme into your `config/_default/` folder. This will ensure you have all the correct theme settings and will enable you to easily customise the theme.
+
+Depending on how you installed the theme you will find the theme config files in different places:
+
+- **Hugo Modules:** In the Hugo cache directory, or [download a copy](https://minhaskamal.github.io/DownGit/#/home?url=https://github.com/jpanther/congo/tree/stable/config/_default) from GitHub
+- **Git submodule or Manual install:** `themes/congo/config/_default`
+
+> **Important:** If you didn't use Hugo Modules to install Congo, you must add the line `theme = "congo"` to the top of your `config.toml` file.
 
 You're now all set up to use Congo. From here you can add some content and start the Hugo server.