Initial landing page based on the existing Wiki home page

Signed-off-by: Benoit Donneaux <benoit@leastauthority.com>

src/_posts/2020-09-08-welcome.md

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+---
+layout: single
+title:  "Welcome"
+date:   2020-09-08 22:24:38 +0200
+excerpt: "Welcome to Dummy Jekyll"
+header:
+  teaser: /assets/images/posts/unsplash-welcome.jpg
+gallery:
+  - image_path: assets/images/posts/unsplash-welcome.jpg
+    alt: "welcome"
+---
+{% include gallery %}
+
+You’ll find this post in your `_posts` directory. Go ahead and edit it and re-build the site to see your changes. You can rebuild the site in many different ways, but the most common way is to run `jekyll serve`, which launches a web server and auto-regenerates your site when a file is updated.
+
+To add new posts, simply add a file in the `_posts` directory that follows the convention `YYYY-MM-DD-name-of-post.ext` and includes the necessary front matter. Take a look at the source for this post to get an idea about how it works.
+
+Jekyll also offers powerful support for code snippets:
+
+{% highlight ruby %}
+def print_hi(name)
+  puts "Hi, #{name}"
+end
+print_hi('Tom')
+#=> prints 'Hi, Tom' to STDOUT.
+{% endhighlight %}
+
+Check out the [Jekyll docs][jekyll-docs] for more info on how to get the most out of Jekyll. File all bugs/feature requests at [Jekyll’s GitHub repo][jekyll-gh]. If you have questions, you can ask them on [Jekyll Talk][jekyll-talk].
+
+[jekyll-docs]: https://jekyllrb.com/docs/home
+[jekyll-gh]:   https://github.com/jekyll/jekyll
+[jekyll-talk]: https://talk.jekyllrb.com/

src/_posts/2020-09-09-post-1.md

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+---
+layout: single
+title:  "Post 1"
+date:   2020-09-09 00:03:05 +0200
+excerpt: "This is a generic post."
+header:
+  teaser: /assets/images/posts/unsplash-post.jpg
+gallery:
+  - image_path: assets/images/posts/unsplash-post.jpg
+    alt: "post"
+---
+{% include gallery %}
+
+This is a generic post.

src/_posts/2020-09-09-post-2.md

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+---
+layout: single
+title:  "Post 2"
+date:   2020-09-09 00:03:05 +0200
+excerpt: "This is a generic post."
+header:
+  teaser: /assets/images/posts/unsplash-post.jpg
+gallery:
+  - image_path: assets/images/posts/unsplash-post.jpg
+    alt: "post"
+---
+{% include gallery %}
+
+This is a generic post.

src/_posts/2020-09-09-post-3.md

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+---
+layout: single
+title:  "Post 3"
+date:   2020-09-09 00:03:05 +0200
+excerpt: "This is a generic post."
+header:
+  teaser: /assets/images/posts/unsplash-post.jpg
+gallery:
+  - image_path: assets/images/posts/unsplash-post.jpg
+    alt: "post"
+---
+{% include gallery %}
+
+This is a generic post.