feat: Update Dockerfile and server configuration for improved health checks and error handling

server/paths.js

@@ -0,0 +1,7 @@
+import { resolve } from "node:path";
+import { fileURLToPath } from "node:url";
+
+/** Where the catalog, the week table and parsed documents are cached; tests use a temporary one. */
+export const DATA = process.env.PSU_DATA_DIR
+  ? resolve(process.env.PSU_DATA_DIR) + "/"
+  : fileURLToPath(new URL("../.data/", import.meta.url));