Install config-example.yaml as example for the debian package

The directory /usr/share/doc/headscale/examples may be used to install
arbitrary example files. This is useful to get a matching configuration
for the release which gets also overwritten automatically.

.goreleaser.yml

@@ -42,10 +42,9 @@ source:
     - "vendor/"
 
 nfpms:
-  # Configure nFPM for .deb and .rpm releases
+  # Configure nFPM for .deb releases
   #
-  # See https://nfpm.goreleaser.com/configuration/
-  # and https://goreleaser.com/customization/nfpm/
+  # See https://goreleaser.com/customization/package/nfpm/
   #
   # Useful tools for debugging .debs:
   # List file contents: dpkg -c dist/headscale...deb
@@ -79,6 +78,8 @@ nfpms:
         dst: /usr/lib/systemd/system/headscale.service
       - dst: /var/lib/headscale
         type: dir
+      - src: ./config-example.yaml
+        dst: /usr/share/doc/headscale/examples/config-example.yaml
       - src: LICENSE
         dst: /usr/share/doc/headscale/copyright
     scripts: