build: fix docker file for next server

Based on https://github.com/xenova/transformers.js/blob/main/examples/next-server/Dockerfile

Dockerfile

@@ -1,24 +1,62 @@
-FROM node:20-alpine as build
+FROM node:20-alpine as base
 
-RUN useradd -m -u 1000 user
-USER user
-ENV HOME=/home/user \
-    PATH=/home/user/.local/bin:$PATH
-WORKDIR $HOME/app
+# Install dependencies only when needed
+FROM base AS deps
+WORKDIR /app
 
-ENV PYTHONPATH=/app
+# Install dependencies based on the preferred package manager
+COPY --link package.json yarn.lock* package-lock.json* pnpm-lock.yaml* ./
+RUN \
+    if [ -f yarn.lock ]; then yarn --frozen-lockfile; \
+    elif [ -f package-lock.json ]; then npm ci; \
+    elif [ -f pnpm-lock.yaml ]; then yarn global add pnpm && pnpm i --frozen-lockfile; \
+    else echo "Lockfile not found." && exit 1; \
+    fi
 
-COPY --chown=user . $HOME/app
+# Rebuild the source code only when needed
+FROM base AS builder
+WORKDIR /app
+COPY --from=deps --link /app/node_modules ./node_modules
+COPY --link  . .
 
-# Install dependencies
-COPY package.json package-lock.* ./
-RUN npm install
+# Next.js collects completely anonymous telemetry data about general usage.
+# Learn more here: https://nextjs.org/telemetry
+# Uncomment the following line in case you want to disable telemetry during the build.
+# ENV NEXT_TELEMETRY_DISABLED 1
 
 # Build the application
-COPY . .
 RUN npm run build
 
+# If using yarn comment out above and use below instead
+# RUN yarn build
+
+# Production image, copy all the files and run next
+FROM base AS runner
+WORKDIR /app
+
+ENV NODE_ENV production
+# Uncomment the following line in case you want to disable telemetry during runtime.
+# ENV NEXT_TELEMETRY_DISABLED 1
+
+RUN \
+    addgroup --system --gid 1001 nodejs; \
+    adduser --system --uid 1001 nextjs
+
+COPY --from=builder --link /app/public ./public
+
+# Automatically leverage output traces to reduce image size
+# https://nextjs.org/docs/advanced-features/output-file-tracing
+COPY --from=builder --link --chown=1001:1001 /app/.next/standalone ./
+COPY --from=builder --link --chown=1001:1001 /app/.next/static ./.next/static
+
+USER nextjs
+
+EXPOSE 3000
+
+ENV PORT 3000
+ENV HOSTNAME 0.0.0.0
+
 # ====================================
-FROM build as release
+FROM base as release
 
 CMD ["npm", "run", "start"]