docs: fix broken systemd unit link

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

debian/README.md

@@ -22,7 +22,7 @@ file size for download/upload, enabling federation, etc.
 Running
 -------
 
-The package uses the `conduwuit.service` systemd unit file to start and
+The package uses the [`conduwuit.service`](../configuration.md#example-systemd-unit-file) systemd unit file to start and
 stop conduwuit. It loads the configuration file mentioned above to set up the
 environment before running the server.
 

docs/configuration.md

@@ -3,3 +3,9 @@
 ``` toml
 {{#include ../conduwuit-example.toml}}
 ```
+
+# Example systemd unit file
+
+```
+{{#include ../debian/conduwuit.service}}
+```

docs/deploying/generic.md

@@ -43,7 +43,7 @@ If conduwuit runs behind a router or in a container and has a different public I
 
 ## Setting up a systemd service
 
-The systemd unit for conduwuit can be found [here](../../debian/conduwuit.service). You may need to change the `ExecStart=` path to where you placed the conduwuit binary.
+The systemd unit for conduwuit can be found [here](../configuration.md#example-systemd-unit-file). You may need to change the `ExecStart=` path to where you placed the conduwuit binary.
 
 ## Creating the conduwuit configuration file
 

nix/pkgs/book/default.nix

@@ -16,6 +16,7 @@ stdenv.mkDerivation {
       "conduwuit-example.toml"
       "CONTRIBUTING.md"
       "README.md"
+      "debian/conduwuit.service"
       "debian/README.md"
       "docs"
     ];