fix: dockerfile

Dockerfile

@@ -1,29 +1,52 @@
-FROM node:18-alpine as base
-RUN apk add --no-cache g++ make py3-pip libc6-compat
+FROM node:18-alpine AS base
+
+# 1. Install dependencies only when needed
+FROM base AS deps
+# Check https://github.com/nodejs/docker-node/tree/b4117f9333da4138b03a546ec926ef50a31506c3#nodealpine to understand why libc6-compat might be needed.
+RUN apk add --no-cache libc6-compat
+
 WORKDIR /app
-COPY package*.json ./
-EXPOSE 3000
 
-FROM base as builder
+# Install dependencies based on the preferred package manager
+COPY 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 corepack enable pnpm && pnpm i; \
+  else echo "Lockfile not found." && exit 1; \
+  fi
+
+
+# 2. Rebuild the source code only when needed
+FROM base AS builder
 WORKDIR /app
+COPY --from=deps /app/node_modules ./node_modules
 COPY . .
+# This will do the trick, use the corresponding env file for each environment.
+COPY .env.production.sample .env.production
 RUN npm run build
 
-
-FROM base as production
+# 3. Production image, copy all the files and run next
+FROM base AS runner
 WORKDIR /app
 
 ENV NODE_ENV=production
-RUN npm ci
 
 RUN addgroup -g 1001 -S nodejs
 RUN adduser -S nextjs -u 1001
+
+COPY --from=builder /app/public ./public
+
+# Automatically leverage output traces to reduce image size
+# https://nextjs.org/docs/advanced-features/output-file-tracing
+COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
+COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static
+
+
 USER nextjs
 
+EXPOSE 3000
 
-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/public ./public
+ENV PORT 3000
 
-CMD npm start
+CMD HOSTNAME=localhost node server.js