Fix guides

Author: pierotofy

src/content/docs/guides/installation.md

@@ -0,0 +1,11 @@
+---
+title: Installation
+description: Get up and running with LibreTranslate.
+---
+
+Guides lead a user through a specific task they want to accomplish, often with a sequence of steps.
+Writing a good guide requires thinking about what your users are trying to do.
+
+## Further reading
+
+- Read [about how-to guides](https://diataxis.fr/how-to-guides/) in the Diátaxis framework