update readme

Kim committed Mar 5, 2026 at 11:47 UTC 91f36193d877cbd4cfeafca9b17ebfced33645b1
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README.md
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4 <img src="/portal.png" alt="Portal logo" width="540" />
5 </p>
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7 -Expose your local application to the public internet — no ports, no NAT, no DNS setup.
7 +<p align="center">Expose your local application to the public internet — no ports, no NAT, no DNS setup.<br />Portal is a self-hosted relay network. You can run your own relay or connect to one that is already running.</p>
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9 -Portal is a self-hosted relay network. You can run your own relay or connect to one that is already running.
9 +<p align="center">将你的本地应用暴露到公网——无需端口映射、无需 NAT、无需 DNS 配置。<br />Portal 是一个可自托管的中继网络。你可以运行自己的中继节点,或连接到已经运行的中继节点。</p>
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11 ## Why Portal?
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