README: add install instructions

README.md

@@ -1,6 +1,30 @@
 # Bisc
+
 ### A small tool that clears qutebrowser cookies
 
+## Installation
+
+bisc is Haskell program available on [Hackage][hackage] and can
+be installed with one of the Haskell package managers. For
+example, with [cabal-install][cabal] you would do
+```
+cabal install bisc
+```
+and similarly for [stack][stack].
+
+Alternatively, if you are using Nix or NixOS, bisc is available
+under the attribute `haskellPackages.bisc`. It should also be in
+the Nix binary cache so you don't have to build from source.
+
+Finally, a statically compiled binaries can be found in the
+[releases](/git/rnhmjoj/bisc/releases).
+
+[hackage]: http://hackage.haskell.org/package/bisc
+[cabal]: https://github.com/haskell/cabal/blob/master/cabal-install/README.md
+[stack]: https://docs.haskellstack.org/en/stable/README/
+
+
+
 ## Configuration
 
 The bisc configuration file is `$XDG_CONFIG_HOME/bisc/bisc.conf`.
@@ -26,7 +50,7 @@ Run `bisc` to delete all non-whitelisted data from qutebrowser.
 
 ## License
 
-Copyright (C) 2019 Michele Guerini Rocco
+Copyright (C) 2020 Michele Guerini Rocco
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by