chore: track site sources + ignore local env/backups

src/lib/buildInfo.ts

@@ -0,0 +1,16 @@
+import { readFileSync } from "node:fs";
+
+type Pkg = { version?: string };
+
+function readPkgVersion(): string {
+  try {
+    const raw = readFileSync(new URL("../../package.json", import.meta.url), "utf-8");
+    const pkg = JSON.parse(raw) as Pkg;
+    return pkg.version ?? "0.0.0";
+  } catch {
+    return "0.0.0";
+  }
+}
+
+export const SITE_RELEASE = process.env.PUBLIC_RELEASE || readPkgVersion();
+export const BUILD_TIME_ISO = new Date().toISOString();