build: Add .npmrc to Dockerfile COPY instruction.

Author: KuekHaoYang

Dockerfile

@@ -8,7 +8,7 @@ RUN apk add --no-cache libc6-compat
 WORKDIR /app
 
 # Install dependencies based on the preferred package manager
-COPY package.json yarn.lock* package-lock.json* pnpm-lock.yaml* ./
+COPY package.json yarn.lock* package-lock.json* pnpm-lock.yaml* .npmrc* ./
 RUN \
   if [ -f yarn.lock ]; then yarn --frozen-lockfile; \
   elif [ -f package-lock.json ]; then npm ci; \