更新 port 為 3005，更新 README

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Dockerfile

@@ -1,3 +1,5 @@
+#  sudo docker run -d -p 3005:3005 --name rental-contract-pdf rental-contract-pdf
+
 FROM node:20-bookworm-slim
 
 RUN apt-get update \
@@ -20,11 +22,11 @@ RUN if [ -d fonts ] && ls fonts/*.{ttf,otf,ttc} 2>/dev/null | grep -q .; then \
     fi
 
 ENV NODE_ENV=production
-ENV PORT=3000
+ENV PORT=3005
 ENV TEMPLATE_DIR=/app/templates
 ENV TEMP_DIR=/tmp/rental-contracts
 ENV SOFFICE_BIN=soffice
 
-EXPOSE 3000
+EXPOSE 3005
 
 CMD ["npm", "start"]