feat: update environment configuration for production and add Docker support

.dockerignore

@@ -0,0 +1,23 @@
+node_modules
+.next
+.git
+.gitignore
+
+# Local env files — set these as environment variables in Coolify instead
+.env
+.env.local
+.env.*.local
+
+# SQLite database files — mount /app/prisma as a persistent volume in Coolify
+prisma/*.db
+prisma/*.db-shm
+prisma/*.db-wal
+prisma/migrations
+
+# Dev/test artifacts
+coverage
+*.log
+vitest.config.ts
+src/**/*.test.ts
+src/**/*.test.tsx
+test/