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/checkScrapedData.js

@@ -0,0 +1,39 @@
+const Database = require("better-sqlite3");
+const db = new Database("travel_rates.db");
+
+// Check tables
+const tables = db
+  .prepare("SELECT name FROM sqlite_master WHERE type='table'")
+  .all();
+console.log(
+  "Tables in database:",
+  tables.map((t) => t.name)
+);
+
+// Check rate entries
+const rateCount = db
+  .prepare("SELECT COUNT(*) as count FROM rate_entries")
+  .get();
+console.log("\nRate entries:", rateCount.count);
+
+// Check accommodations
+const accommCount = db
+  .prepare("SELECT COUNT(*) as count FROM accommodations")
+  .get();
+console.log("Accommodations:", accommCount.count);
+
+// Check Latvia/Riga
+const latvia = db
+  .prepare(
+    `
+  SELECT city, jan, feb, mar, apr, may, jun, jul, aug, sep, oct, nov, dec 
+  FROM accommodations 
+  WHERE country = 'Latvia'
+`
+  )
+  .all();
+
+console.log("\nLatvia accommodations:");
+console.log(JSON.stringify(latvia, null, 2));
+
+db.close();