fix: env 추가

Author: Gwonyeong

prod.dockerfile

@@ -26,6 +26,7 @@ COPY --from=builder /app/src/config ./src/config
 ENV NODE_ENV=production
 
 COPY scripts/server-start.sh ./server-start.sh
+COPY .env ./
 RUN chmod +x ./server-start.sh
 
 CMD ["./server-start.sh"]