Add first version of the frontend

As of now the only usable functionality is signin in/out and managing
authorized users, and even then there is much room for improvement.

Change-Id: Ib87fc6866f69113a230187710de8644b78391917
diff --git a/frontend/.gitignore b/frontend/.gitignore
new file mode 100644
index 0000000..b947077
--- /dev/null
+++ b/frontend/.gitignore
@@ -0,0 +1,2 @@
+node_modules/
+dist/