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Guide Shows How to Deploy an App to a VPS Using Docker, Nginx, and SSL

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A step-by-step tutorial explains how to deploy an application to a Debian or Ubuntu virtual private server. It begins with updating the system and creating a separate deploy user instead of relying on root. The guide then covers securing access by setting up SSH key authentication, disabling root and password logins, and configuring a firewall that permits only SSH, HTTP, and HTTPS traffic. Finally, it walks through installing Docker and packaging the app into an image using a Dockerfile, with a Node.js example.

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