CI: Add a netlify configuration

.netlify.sh

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+
+#
+# Deploy a preview of the interface specification to netlify
+#
+
+set -e
+
+export NP_GIT=$(which git)
+
+wget -nv https://github.com/DavHau/nix-portable/releases/download/v009/nix-portable
+chmod +x nix-portable
+
+./nix-portable nix-build -A interface-spec default.nix
+
+# The "result" symlink only valid inside the nix-portable sandbox, so use nix-shell
+./nix-portable nix-shell -p bash --run "cp -rL result/spec/ _netlify-deploy"
+
+chmod -R u+w _netlify-deploy

netlify.toml

@@ -0,0 +1,3 @@
+[build]
+  command = "./.netlify.sh"
+  publish = "_netlify-deploy"