Added Jest for testing both front and backend

server/api/__snapshots__/user.test.js.snap

@@ -0,0 +1,16 @@
+exports[`test should require authentication 1`] = `
+Object {
+  "message": "Authentication required"
+}
+`;
+
+exports[`test should return known user 1`] = `
+Object {
+  "data": Object {
+    "avatarUrl": "http://example.com/avatar.png",
+    "id": "86fde1d4-0050-428f-9f0b-0bf77f8bdf61",
+    "name": "User 1",
+    "username": "user1"
+  }
+}
+`;