Implement tiled multiplayer city simulation and scaling stages

server/build.rs

@@ -0,0 +1,5 @@
+fn main() {
+    std::env::set_var("PROTOC", protoc_bin_vendored::protoc_bin_path().unwrap());
+    prost_build::compile_protos(&["../proto/city.proto"], &["../proto"]).unwrap();
+    println!("cargo:rerun-if-changed=../proto/city.proto");
+}