Add Dependencies section to README.md

README.md

@@ -5,11 +5,7 @@ True color if the terminal supports it, otherwise falls back to small palette.
 `termage` uses ImageMagick to convert your image to ppm format, properly scaled
 as well,, which is fed to `termage` for display.
 
-## Build
-
-`make`
-
-after building and installing dependencies:
+## Dependencies
 
 - [libscerror](https://git.bobpolis.com/bob/libscerror/)
 - [libscstring](https://git.bobpolis.com/bob/libscstring/)
@@ -17,16 +13,20 @@ after building and installing dependencies:
 - NetPBM (development library)
 - ImageMagick (tools)
 
+## Build
+
+`make`
+
 ## Install
 
 `sudo make install`
 
-or, on OpenBSD:
-
-`doas gmake install`
-
 ## Run
 
 `termage <image file>`
 
 : Shows given image file in the terminal.
+
+## Documentation
+
+`man termage`