feat: add scripts for database inspection and migration

- Implemented multiple scripts to check and inspect meal plans, scraped data, and accommodations for Munich and Riga.
- Added a migration script to convert scraped data into the application's database format.
- Introduced new database service methods for querying and updating travel rates.
- Enhanced server configuration for serving static files in production.
- Updated PostCSS configuration for consistency.

scripts/queryMunich.js

@@ -0,0 +1,16 @@
+const Database = require("better-sqlite3");
+const path = require("path");
+const db = new Database(
+  path.join(__dirname, "..", "database", "travel_rates.db")
+);
+const row = db
+  .prepare(
+    `
+    SELECT city_name, country, currency, meal_currency, meal_plan_type, meal_total,
+      breakfast, lunch, dinner, incidentals
+  FROM travel_rates
+  WHERE lower(city_name) = 'munich'
+`
+  )
+  .get();
+console.log(row);