title: Is there a reason why yarn build takes long inside Docker?
body: <p>I'm trying to build a nextjs app <code>(yarn build)</code> inside docker but it's taking extremely long 1hr+ to generate static pages.
  Outside docker, it doesn't take long. I've also noticed it doesn't take this long inside github actions so I'm suspecting it might be something related to my Docker?
  I'm using <code>Docker version 20.10.14, build a224086</code> on Mac-OS</p>
  <p>Here is My Dockerfile just incase</p>
  <pre><code># Install dependencies only when needed
  FROM node:16 AS deps
  WORKDIR /app
  COPY package.json yarn.lock ./
  RUN yarn install --frozen-lockfile
  
  # Rebuild the source code only when needed
  FROM node:16 AS builder
  
  ARG API_KEY \
      API_BASE \
      # Next.js collects completely anonymous telemetry data about general usage.
      # Learn more here: https://nextjs.org/telemetry
      NEXT_TELEMETRY_DISABLED=1
  
  ENV API_KEY=${API_KEY} \
      API_BASE=${API_BASE} \
      NEXT_TELEMETRY_DISABLED=${NEXT_TELEMETRY_DISABLED}
  
  WORKDIR /app
  
  COPY . .
  COPY --from=deps /app/node_modules ./node_modules
  RUN yarn build
  
  # Production image, copy all the files and run next
  FROM node:16 AS runner
  
  ENV NODE_ENV production \
      NEXT_TELEMETRY_DISABLED=1
  
  WORKDIR /app
  
  RUN addgroup --system --gid 1001 nodejs
  RUN adduser --system --uid 1001 nextjs
  
  COPY --from=builder /app/next.config.js ./
  COPY --from=builder /app/public ./public
  COPY --from=builder --chown=nextjs:nodejs /app/.next ./.next
  COPY --from=builder /app/node_modules ./node_modules
  COPY --from=builder /app/package.json ./package.json
  COPY --from=builder /app/scripts ./scripts
  COPY --from=builder --chown=nextjs:nodejs /app/src/data ./src/data
  
  USER nextjs
  
  EXPOSE 3000
  
  CMD [&quot;yarn&quot;, &quot;start&quot;]
  </code></pre>