📜 docs: update the installation instructions (#148)

docs/installation.md

@@ -10,7 +10,7 @@ paru -S websurfx-edge-git
 
 After installing it you can run the websurfx server by running the following commands:
 
-``` bash
+```bash
 redis-server --port 8082 &
 websurfx
 ```
@@ -19,7 +19,7 @@ Once you have started the server, open your preferred web browser and navigate t
 
 If you want to change the port or the ip or any other configuration setting checkout the [configuration docs](./configuration.md).
 
-## Other Distros 
+## Other Distros
 
 The package is currently not available on other Linux distros. With contribution and support it can be made available on other distros as well 🙂.
 
@@ -91,12 +91,16 @@ production_use = false -- whether to use production mode or not (in other words
 -- The different colorschemes provided are:
 -- {{
 -- catppuccin-mocha
+-- dark-chocolate
 -- dracula
+-- gruvbox-dark
 -- monokai
 -- nord
 -- oceanic-next
+-- one-dark
 -- solarized-dark
 -- solarized-light
+-- tokyo-night
 -- tomorrow-night
 -- }}
 colorscheme = "catppuccin-mocha" -- the colorscheme name which should be used for the website theme
@@ -104,6 +108,9 @@ theme = "simple" -- the theme name which should be used for the website
 
 -- ### Caching ###
 redis_connection_url = "redis://redis:6379" -- redis connection url address on which the client should connect on.
+
+-- ### Search Engines ###
+upstream_search_engines = { DuckDuckGo = true, Searx = false } -- select the upstream search engines from which the results should be fetched.
 ```
 
 After this run the following command to deploy the app:
@@ -124,4 +131,4 @@ cd websurfx
 git checkout stable
 ```
 
-[⬅️  Go back to Home](./README.md)
+[⬅️ Go back to Home](./README.md)