Add basic netlify deploy configuration

netlify.toml

@@ -0,0 +1,23 @@
+# Netlify deploy configuration
+# See https://www.netlify.com/docs/continuous-deployment/#deploy-contexts
+
+# Global settings applied to the whole site.
+#
+# “publish” is the directory to publish (relative to root of your repo),
+# “command” is your build command,
+# “base” is directory to change to before starting build. if you set base:
+#    that is where we will look for package.json/.nvmrc/etc not repo root!
+
+[build]
+  publish = "site-build"
+  command = "npm run generate-site"
+
+[[redirects]]
+  from = "/versions/:majorversion/*"
+  to = "https://:majorversion--clever-morse-e60990.netlify.com/:splat"
+  status = 200
+
+[[redirects]]
+  from = "/unexpected-*"
+  to = "https://unexpectedjs.github.io/unexpected-:splat"
+  status = 200