Add authentication layer

central_backend/src/server/unsecure_server/unsecure_server_controller.rs

@@ -0,0 +1,7 @@
+use actix_web::HttpResponse;
+
+pub async fn unsecure_home() -> HttpResponse {
+    HttpResponse::Ok()
+        .content_type("text/plain")
+        .body("SolarEnergy unsecure central backend")
+}