Update readme

README.md

@@ -1,3 +1,10 @@
 ## heic-converter
 
-Built with rust, to build you need vcpkg and [libheif](https://github.com/strukturag/libheif) installed.
+Built with rust, to build you need [vcpkg](https://github.com/microsoft/vcpkg) and [libheif](https://github.com/ImageMagick/heif) and [imagemagick](https://github.com/ImageMagick/ImageMagick) installed.
+
+This binary converts HEIC to png format with high quality and compressed it on jpg format. Both PNG and JPG images will be saved at `output` folder. 
+The said folder will be generated by the binary if it didn't exist.
+
+## Why not just use imagemagick and script on converting the images
+
+Yes you can do that, but again I also added image compression for my own use.