docs: cleanup location of documentation

examples/nauthz/build.rs

@@ -0,0 +1,7 @@
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    tonic_build::configure()
+        .build_server(false)
+        .protoc_arg("--experimental_allow_proto3_optional")
+        .compile(&["../../proto/nauthz.proto"], &["../../proto"])?;
+    Ok(())
+}