feat: implement core BlackStream platform functionality

Co-authored-by: blackboxprogramming <118287761+blackboxprogramming@users.noreply.github.com>

backend/user-service/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "user-service",
+  "version": "0.1.0",
+  "description": "User authentication and profile management service for BlackStream",
+  "main": "index.js",
+  "scripts": {
+    "start": "node index.js"
+  },
+  "license": "MIT",
+  "dependencies": {
+    "cors": "^2.8.5",
+    "express": "^4.18.2",
+    "express-rate-limit": "^8.3.1"
+  }
+}