feat(docker): add Dockerfiles and update next.config.js for admin and storefront applications

- Introduced Dockerfiles for both admin and storefront applications to streamline the build and deployment process using multi-stage builds.
- Configured the Dockerfiles to install dependencies, build the applications, and set up a minimal runtime environment.
- Updated next.config.js for both applications to enable standalone output and set the outputFileTracingRoot for proper file tracing in a monorepo setup.

This commit enhances the containerization of the applications, improving deployment efficiency and reducing image sizes.

apps/storefront/Dockerfile

@@ -0,0 +1,59 @@
+# Build context: ./out  (turbo prune storefront --docker)
+# out/json/  — package.json files only   → used by deps stage for layer caching
+# out/full/  — full pruned monorepo       → used by builder stage for source
+# out/package-lock.json
+
+# ── Stage 1: deps ────────────────────────────────────────────────────────────
+# Install ALL dependencies (dev + prod) using only the package.json tree.
+# This layer is shared with the builder stage and only rebuilds when
+# a package.json or the lock file changes — not when source code changes.
+FROM node:20-alpine AS deps
+
+RUN apk add --no-cache libc6-compat
+WORKDIR /app
+
+COPY json/ .
+COPY package-lock.json .
+RUN npm ci
+
+# ── Stage 2: builder ─────────────────────────────────────────────────────────
+# Full monorepo source + build artifact.
+# next build produces .next/standalone/ because output: "standalone" is set
+# in next.config.js — that's what makes the runner stage small.
+FROM node:20-alpine AS builder
+
+WORKDIR /app
+
+COPY --from=deps /app/node_modules ./node_modules
+COPY full/ .
+
+ENV NEXT_TELEMETRY_DISABLED=1
+
+RUN npx turbo build --filter=storefront
+
+# ── Stage 3: runner ──────────────────────────────────────────────────────────
+# Minimal runtime image — only the standalone bundle, static assets, and public dir.
+# No source code, no dev dependencies, no build tools.
+FROM node:20-alpine AS runner
+
+WORKDIR /app
+
+ENV NODE_ENV=production \
+    NEXT_TELEMETRY_DISABLED=1 \
+    HOSTNAME=0.0.0.0 \
+    PORT=3000
+
+# Non-root user for security
+RUN addgroup -g 1001 -S nodejs && adduser -S nextjs -u 1001
+
+# standalone output mirrors the monorepo tree, so server.js lands at /app/server.js
+# Static files and public/ must be copied separately — they are not in standalone/
+COPY --from=builder --chown=nextjs:nodejs /app/apps/storefront/.next/standalone ./
+COPY --from=builder --chown=nextjs:nodejs /app/apps/storefront/.next/static ./apps/storefront/.next/static
+COPY --from=builder --chown=nextjs:nodejs /app/apps/storefront/public ./apps/storefront/public
+
+USER nextjs
+
+EXPOSE 3000
+
+CMD ["node", "server.js"]