✨ Add image resizing and srcset generation

exampleSite/content/_index.md

@@ -26,4 +26,4 @@ This is a demo site built entirely using Congo. It also contains a complete set
 
 Explore the [sample pages]({{< ref "samples" >}}) to get a feel for what Congo can do. If you like what you see, check out the project on [Github](https://github.com/jpanther/congo) or read the [Installation guide]({{< ref "docs/installation" >}}) to get started.
 
-{{< figure src="mountains.jpg" width="1200" height="800" caption="Photo by [Anna Scarfiello](https://unsplash.com/@little_anne?utm_source=unsplash&utm_medium=referral&utm_content=creditCopyText) on [Unsplash](https://unsplash.com/?utm_source=unsplash&utm_medium=referral&utm_content=creditCopyText)." >}}
+![A stylised photograph of a purple squid on a pink backdrop.](squid.jpg "Photo by [Jippe Joosten](https://unsplash.com/@jippe_joosten?utm_source=unsplash&utm_medium=referral&utm_content=creditCopyText) on [Unsplash](https://unsplash.com/s/photos/vibrant-purple?utm_source=unsplash&utm_medium=referral&utm_content=creditCopyText).")

exampleSite/content/docs/_index.md

@@ -11,7 +11,7 @@ cascade:
 Simple, yet powerful. Learn how to use Congo and its features.
 {{< /lead >}}
 
-{{< figure src="screenshot.png" >}}
+![Screenshots of Congo on an iPhone, iPad and MacBook](screenshot.png)
 
 This section contains everything you need to know about Congo. If you're new, check out the [Installation]({{< ref "docs/installation" >}}) guide to begin or visit the [Samples]({{< ref "samples" >}}) section to see what Congo can do.
 

exampleSite/content/docs/homepage-layout/index.md

@@ -15,7 +15,7 @@ The layout of the homepage is controlled by the `homepage.layout` setting in the
 
 The default layout is the page layout. It's simply a normal content page that displays your Markdown content. It's great for static websites and provides a lot of flexibility.
 
-![Profile layout](home-page.jpg)
+![Screenshot of homepage layout](home-page.jpg)
 
 To enable the page layout, set `homepage.layout = "page"` in the `params.toml` configuration file.
 
@@ -23,7 +23,7 @@ To enable the page layout, set `homepage.layout = "page"` in the `params.toml` c
 
 The profile layout is great for personal websites and blogs. It puts the author's details front and centre by providing an image and links to social profiles.
 
-![Profile layout](home-profile.jpg)
+![Screenshot of profile layout](home-profile.jpg)
 
 The author information is provided in the `config.toml` configuration file. Refer to the [Getting Started]({{< ref "getting-started" >}}) and [Site Configuration]({{< ref "configuration#site-configuration" >}}) sections for parameter details.