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/Dockerfile

@@ -0,0 +1,26 @@
+FROM node:20-alpine
+
+WORKDIR /app
+
+# Set apk mirror and install build tools for native modules
+RUN sed -i 's/dl-cdn.alpinelinux.org/mirrors.aliyun.com/g' /etc/apk/repositories && \
+    apk add --no-cache python3 make g++ imagemagick poppler-utils ghostscript
+
+# Copy package files
+COPY package*.json yarn.lock* ./
+
+# Set yarn registry and install all dependencies (including dev for build)
+RUN yarn config set registry https://registry.npmmirror.com && \
+    yarn install
+
+# Copy source code
+COPY . .
+
+# Build the application
+RUN yarn build
+
+# Expose port
+EXPOSE 3001
+
+# Start application
+CMD ["node", "/app/dist/main.js"]