Update installation guide. (#204)

_docs/INSTALL.md

@@ -1,5 +1,32 @@
 # Installation
 
+## Homebrew 🍻
+```bash
+brew install spoofdpi
+```
+### Usage
+#### Binary
+You can start SpoofDPI with:
+```bash
+spoofdpi
+```
+#### Service
+Alternatively you can start SpoofDPI as a service
+- with automatic relaunch on startup:
+    ```bash
+    brew services start spoofdpi
+    ```
+- without:
+    ```bash
+    brew services run spoofdpi
+    ```
+##### Logs
+When running as a service, SpoofDPI writes logs to
+```text
+$HOMEBREW_PREFIX/var/log/spoofdpi/output.log
+$HOMEBREW_PREFIX/var/log/spoofdpi/error.log
+```
+
 ## Binary
 SpoofDPI will be installed in `~/.spoof-dpi/bin`.
 To run SpoofDPI in any directory, add the line below to your `~/.bashrc || ~/.zshrc || ...`
@@ -30,7 +57,6 @@ curl -fsSL https://raw.githubusercontent.com/xvzc/SpoofDPI/main/install.sh | bas
 curl -fsSL https://raw.githubusercontent.com/xvzc/SpoofDPI/main/install.sh | bash -s linux-mipsle
 ```
 
-
 ## Go
 You can also install SpoofDPI with `go install`
 ```bash