Add Docker things

Dockerfile

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+FROM node:20-alpine AS deps
+WORKDIR /app
+
+COPY package.json package-lock.json* yarn.lock* pnpm-lock.yaml* ./
+RUN \
+  if [ -f yarn.lock ]; then yarn install --frozen-lockfile; \
+  elif [ -f package-lock.json ]; then npm ci; \
+  elif [ -f pnpm-lock.yaml ]; then corepack enable pnpm && pnpm install --frozen-lockfile; \
+  else echo "No lockfile found." && exit 1; \
+  fi
+
+FROM node:20-alpine AS builder
+WORKDIR /app
+
+COPY --from=deps /app/node_modules ./node_modules
+COPY . .
+
+ENV NEXT_TELEMETRY_DISABLED=1
+
+RUN \
+  if [ -f yarn.lock ]; then yarn build; \
+  elif [ -f package-lock.json ]; then npm run build; \
+  elif [ -f pnpm-lock.yaml ]; then corepack enable pnpm && pnpm run build; \
+  fi
+
+FROM node:20-alpine AS runner
+WORKDIR /app
+
+ENV NODE_ENV=production
+ENV NEXT_TELEMETRY_DISABLED=1
+ENV PORT=80
+
+RUN addgroup --system --gid 1001 nodejs && \
+    adduser --system --uid 1001 nextjs
+
+COPY --from=builder /app/public ./public
+COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
+COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static
+
+USER nextjs
+
+EXPOSE 80
+
+CMD ["node", "server.js"]

docker-compose.yml

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+services:
+  nextjs-alixz:
+    build:
+      context: .
+      dockerfile: Dockerfile
+      args:
+        container_name: nextjs-alixz
+    env_file: .env
+    restart: unless-stopped
+    networks:
+      - interservices
+
+networks:
+  interservices:
+    external: true