feat: add deployment reload controls

Dockerfile

@@ -18,7 +18,8 @@ ENV NEXT_TELEMETRY_DISABLED=1
 COPY . .
 # Build Next.js
 RUN --mount=type=cache,target=/app/.next/cache \
-    bun run build
+    bun -e "await Bun.write('.version', crypto.randomUUID())" && \
+    NEXT_DEPLOYMENT_ID="$(bun -e 'process.stdout.write(await Bun.file(".version").text())')" bun run build
 
 # The standalone tracer includes both glibc and musl Sharp packages. Alpine only
 # needs musl, so prune the incompatible copy before it enters a runtime layer.
@@ -38,6 +39,7 @@ ENV PORT=3000
 COPY --from=builder /app/.next/standalone ./
 COPY --from=builder /app/public ./public
 COPY --from=builder /app/.next/static ./.next/static
+COPY --from=builder /app/.version ./.version
 
 EXPOSE 3000
 CMD ["bun", "server.js"]