Move installation guide to docs

docs/installation.rst

@@ -0,0 +1,42 @@
+Installation
+============
+
+NixOS
+-----
+
+/etc/nixos/configuration.nix::
+
+  virtualisation.libvirtd = {
+    enable = true;
+    qemuVerbatimConfig = ''
+      namespaces = []
+      user = "${username}"
+      group = "users"
+    '';
+  };
+
+  users.users."${username}".extraGroups = [ ... "libvirtd" ];
+
+shell::
+
+  nix run -f https://code.dumpstack.io/tools/appvm/archive/master.tar.gz -c appvm
+
+Ubuntu 19.10
+------
+
+Requirements::
+
+  sudo apt install virt-manager curl git
+  echo user = "\"$USER\"" | sudo tee -a /etc/libvirt/qemu.conf
+  echo '/var/tmp/** rwlk,' | sudo tee -a /etc/apparmor.d/local/abstractions/libvirt-qemu
+  curl https://nixos.org/nix/install | sh
+  systemctl reboot
+
+Use latest stable nixpkgs channel::
+
+  nix-channel --add https://nixos.org/channels/nixos-19.09 nixpkgs
+  nix-channel --update
+
+Install appvm::
+
+  nix-env -if https://code.dumpstack.io/tools/appvm/archive/master.tar.gz