docs: more improvements, fixes, cleanup, etc

Signed-off-by: strawberry <strawberry@puppygock.gay>

docs/configuration.md

@@ -1,11 +1,32 @@
-# Example configuration
+## Example configuration
 
-``` toml
+<details>
+<summary>Example configuration</summary>
+
+```toml
 {{#include ../conduwuit-example.toml}}
 ```
 
-# Example systemd unit file
+</details>
+
+## Debian systemd unit file
+
+<details>
+<summary>Debian systemd unit file</summary>
 
 ```
 {{#include ../debian/conduwuit.service}}
 ```
+
+</details>
+
+## Arch Linux systemd unit file
+
+<details>
+<summary>Arch Linux systemd unit file</summary>
+
+```
+{{#include ../arch/conduwuit.service}}
+```
+
+</details>