docs: update install instructions for Forgejo

README.md

@@ -2,11 +2,31 @@
 
 TUI SSH monitor for Synology DSM 7.x — read-only dashboard inspired by `btop`.
 
-```
-brew tap janvete/tools
+## Installation
+
+### macOS (Homebrew)
+
+```bash
+brew tap janvete/tools https://git.janvete.com/seth/homebrew-tools.git
 brew install dsmview
 ```
 
+### Debian / Ubuntu (APT)
+
+```bash
+echo "deb [trusted=yes] https://git.janvete.com/seth/apt/raw/branch/main ./" | sudo tee /etc/apt/sources.list.d/janvete.list
+sudo apt update
+sudo apt install dsmview
+```
+
+### From source
+
+```bash
+git clone ssh://git@git-ssh.janvete.com:554/seth/dsmview.git
+cd dsmview
+pip install .
+```
+
 ## Usage
 
 ```