Added deps for using Diesel in Rocket

src/main.rs

@@ -1,3 +1,10 @@
-fn main() {
-    println!("Hello, world!");
+#[macro_use]
+extern crate rocket;
+
+#[macro_use]
+extern crate diesel_migrations;
+
+#[launch]
+fn rocket() -> _ {
+    rocket::build()
 }