feat: implement QuestionBank CRUD with pagination and template query

- Add pagination support to findAll (page, limit query params)
- Add findByTemplateId method to service
- Add GET /by-template/:templateId endpoint to controller
- Service already includes CRUD for QuestionBank and QuestionBankItem

server/.dockerignore

@@ -0,0 +1,13 @@
+node_modules
+dist
+build
+*.log
+.env.local
+.env.development
+.env.test
+coverage
+.nyc_output
+test
+*.test.ts
+*.spec.ts
+!/uploads/