doc: installation

README.md

@@ -1,2 +1,20 @@
 # toolbx
 Create your own organization cli tool like gcloud or aws-cli. Toolbx helps you with exploration and distribution of your internal CLI tools
+
+## Install Toolbx
+
+Toolbx currently provides binaries for the following:
+
+- MacOS (64bit only)
+- Linux 
+- Windows
+
+Download appropriate version for your platform from [Toolbx Releases](). Once
+it's downloaded, you will unarchive the `toolbx` binary. You don't need to 
+install the binary to some global location. The binary works well also from 
+any place.
+
+But for easy to use you should move the `toolbx` binary somewhere in your `PATH` 
+(e.g. to `/usr/local/bin`).
+
+