Cloud & DevOps
Jason Yang · 25 Mar, 2026
Set up a local Docker registry on your LAN to build and deploy images across machines with no cloud costs — plus automated redeploys with Watchtower, all free.
Programming Language
Jason Yang · 22 Mar, 2026
When to use HashSet, LinkedHashSet, or TreeSet in Java: their differences explained simply, and how they map to Python's set, dict, and sorted().
Linux
Jason Yang · 11 Feb, 2026
Set up a Caddy reverse proxy with automatic HTTPS using Docker: configure port forwarding, Docker Compose, and automatic certificate renewal.
Troubleshooting
Jason Yang · 08 Feb, 2026
Log in to the TELUS Network Access Hub (NAH) at 192.168.1.254 to set up DDNS and port forwarding — how to tell the NAH from the Wi-Fi Hub and find its IP.
Framework
Jason Yang · 26 Jan, 2026
MapStruct is a compile-time mapping tool for Spring projects that reduces boilerplate, improves safety, and makes DTO mapping cleaner and more testable.
