refactor: bare structure for new backend architecture and runtime; no behavior changes yet

server/src/config/runtime.ts

@@ -0,0 +1,20 @@
+import path from 'path';
+import { fileURLToPath } from 'url';
+
+import type { RuntimePaths } from '../shared/types/app.js';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+export function getRuntimePaths(): RuntimePaths {
+  const serverSrcDir = path.resolve(__dirname, '..');
+  const serverDir = path.resolve(serverSrcDir, '..');
+
+  return {
+    serverSrcDir,
+    serverDir,
+    projectRoot: path.resolve(serverDir, '..'),
+    legacyRuntimePath: path.join(serverDir, 'legacy-runtime.js'),
+    bootstrapEntrypointPath: path.join(serverDir, 'dist', 'bootstrap.js'),
+  };
+}