Remove RUN npm install -g npm@11 from both Dockerfiles

Agent-Logs-Url: https://github.com/asepindrak/commitflow/sessions/611ef1bb-494b-44af-9e7c-bb46ffe011e5

Co-authored-by: asepindrak <13974298+asepindrak@users.noreply.github.com>

Author: Copilot

backend/Dockerfile

@@ -17,9 +17,6 @@ RUN apt-get update && apt-get install -y \
     libssl-dev \
     && rm -rf /var/lib/apt/lists/*
 
-# Update npm versi terbaru
-RUN npm install -g npm@11
-
 # Salin dependency info lebih dulu
 COPY package*.json ./
 

frontend/Dockerfile

@@ -5,7 +5,6 @@ FROM node:20-alpine AS base
 WORKDIR /app
 
 COPY package*.json ./
-RUN npm install -g npm@11
 # =========================
 # STAGE 2: DEPENDENCIES
 # =========================