Fix: Use npm ci instead of pnpm

Co-authored-by: Cursor <cursoragent@cursor.com>

Dockerfile

@@ -11,11 +11,9 @@ WORKDIR /app
 
 # Copy package files
 COPY package*.json ./
-COPY pnpm-lock.yaml* ./
 
 # Install dependencies
-RUN npm install -g pnpm
-RUN pnpm install --frozen-lockfile
+RUN npm ci
 
 # Rebuild the source code only when needed
 FROM base AS builder