add better 403 screens and start with bun dev mode. (going to rewrite to fit the bun standard in a bit).

Overlord-Server/scripts/dev.ts

@@ -0,0 +1,70 @@
+/**
+ * Development supervisor.
+ *
+ * Keeps the backend and generated Tailwind stylesheet up to date while
+ * preserving a single foreground process for the repository launchers.
+ */
+
+const cwd = import.meta.dir.replace(/[\\/]scripts$/, "");
+const env = {
+  ...process.env,
+  NODE_ENV: "development",
+};
+
+function runPreparation(command: string): void {
+  const result = Bun.spawnSync(["bun", "run", command], {
+    cwd,
+    env,
+    stdin: "inherit",
+    stdout: "inherit",
+    stderr: "inherit",
+  });
+
+  if (!result.success) {
+    process.exit(result.exitCode || 1);
+  }
+}
+
+runPreparation("build:css");
+runPreparation("vendor");
+
+const backend = Bun.spawn(["bun", "--watch", "src/index.ts"], {
+  cwd,
+  env,
+  stdin: "inherit",
+  stdout: "inherit",
+  stderr: "inherit",
+});
+
+const styles = Bun.spawn(["bun", "run", "watch:css"], {
+  cwd,
+  env,
+  stdin: "inherit",
+  stdout: "inherit",
+  stderr: "inherit",
+});
+
+let stopping = false;
+
+function stop(exitCode = 0): void {
+  if (stopping) return;
+  stopping = true;
+  backend.kill();
+  styles.kill();
+  process.exitCode = exitCode;
+}
+
+process.on("SIGINT", () => stop(130));
+process.on("SIGTERM", () => stop(143));
+
+const result = await Promise.race([
+  backend.exited.then((exitCode) => ({ process: "backend", exitCode })),
+  styles.exited.then((exitCode) => ({ process: "Tailwind watcher", exitCode })),
+]);
+
+if (!stopping) {
+  console.error(`[dev] ${result.process} exited with code ${result.exitCode}`);
+  stop(result.exitCode || 1);
+}
+
+await Promise.allSettled([backend.exited, styles.exited]);