fix relative link in readme

exampleSite/content/usage/getting-started.md

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+---
+title: Getting Started
+weight: -20
+---
+
+This page tells you how to get started with the Geekdoc theme, including installation and basic configuration.
+
+<!-- spellchecker-disable -->
+
+{{< toc >}}
+
+<!-- spellchecker-enable -->
+
+## Install requirements
+
+You need a recent version of Hugo for local builds and previews of sites that use Geekdoc. As we are using [gulp](https://gulpjs.com/) as pre-processor the normal version of Hugo is sufficient. If you prefer the extended version of Hugo anyway this will work as well. For comprehensive Hugo documentation, see [gohugo.io](https://gohugo.io/documentation/).
+
+If you want to use the theme from a cloned branch instead of a release tarball you'll need to install `gulp` locally and run the default pipeline once to create all required assets.
+
+```Shell
+# install required packages from package.json
+npm install
+
+# run gulp pipeline to build required assets
+gulp default
+```
+
+## Using the theme
+
+To prepare your new site environment just a few steps are required:
+
+1. Create a new empty Hugo site.
+
+   ```Shell
+   hugo new site demosite
+   ```
+
+2. Switch to the root of the new site.
+
+   ```Shell
+   cd demosite
+   ```
+
+3. Install the Geekdoc theme from a [release bundle](#option-1-download-pre-build-release) (recommended) or form [Git branch](#option-2-clone-the-github-repository).
+
+4. Create the minimal required Hugo configuration `config.toml`. For all configuration options see [here](/usage/configuration/).
+
+   ```Toml
+   baseURL = "http://localhost"
+   title = "Geekdocs"
+   theme = "hugo-geekdoc"
+
+   # Geekdoc required configuration
+   pygmentsUseClasses = true
+   pygmentsCodeFences = true
+
+   disablePathToLower = true
+   enableGitInfo=true
+
+   # Needed for mermaid shortcodes
+   [markup]
+     [markup.goldmark.renderer]
+       # Needed for mermaid shortcode
+       unsafe = true
+     [markup.tableOfContents]
+       startLevel = 1
+       endLevel = 9
+   ```
+
+5. Test your site.
+
+   ```Shell
+   hugo server --theme geekdoc -D
+   ```
+
+### Option 1: Download pre-build release bundle
+
+Download and extract the latest release bundle into the theme directory.
+
+```Shell
+curl -L https://github.com/xoxys/hugo-geekdoc/releases/latest/download/hugo-geekdoc.tar.gz | tar -xz -C themes/hugo-geekdoc/ --strip-components=1
+```
+
+### Option 2: Clone the GitHub repository
+
+{{< hint info >}}
+**Info**\
+Keep in mind this method is not recommended and needs some extra steps to get it working.
+If you want to use the Theme as submodule keep in mind that your build process need to
+run the described steps as well.
+{{< /hint >}}
+
+Clone the Geekdoc git repository.
+
+```Shell
+git clone https://github.com/xoxys/hugo-geekdoc.git themes/geekdoc
+```
+
+Build required theme assets e.g. CSS files and SVG sprites with `gulp`.
+
+```Shell
+gulp default
+```