Migrate to Docusaurus (#108)

* migrate to Docusaurus framework

.gitignore

@@ -1,6 +1,26 @@
-vendor/
-.bundle/
+# Dependencies
+/node_modules
+
+# Production
+/build
+
+# Generated files
+.docusaurus
+.cache-loader
+
+# Misc
 .DS_Store
-node_modules
-.vscode
-.idea
+.env
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.yalc
+yalc.lock
+.idea
+
+static/search-index.json