feat: add database connection with modified endpoints

.vscode/http/url.rest

@@ -0,0 +1,10 @@
+### redirect_to_original_url
+GET http://localhost:8000/
+
+### create_url_shortcode
+POST http://localhost:8000/shorten
+Content-Type: application/json
+
+{
+    "url": "https://google.com/"
+}