feat(server): add /api/version endpoint exposing git hash

server/build.rs

@@ -0,0 +1,11 @@
+use std::process::Command;
+
+fn main() {
+    if let Ok(output) = Command::new("git").args(&["rev-parse", "--short", "HEAD"]).output() {
+        if let Ok(hash) = String::from_utf8(output.stdout) {
+            println!("cargo:rustc-env=GIT_HASH={}", hash.trim());
+        }
+    }
+    println!("cargo:rerun-if-changed=../.git/HEAD");
+    println!("cargo:rerun-if-changed=../.git/index");
+}