Simplify repo init with just

initialization can now simply performed with "just" or "just init"

README.md

@@ -6,6 +6,5 @@ The server's OpenAPI contract is added via Git submodules. OpenAPI generator cli
 
 ```sh
 git clone
-git submodule update --init --recursive #Update OpenAPI submodule
-just openapi #Generate OpenAPI types
+just
 ```

justfile

@@ -1,2 +1,17 @@
+#Generate OpenAPI types
 openapi:
     openapi-generator-cli generate -i ./openapi/api/server.yaml -g rust-axum -o ./openapi/module
+
+#Add OpenAPI submodule
+submodule-init:
+	git submodule update --init --recursive
+
+#Update OpenAPI contract
+submodule-update:
+	git submodule update --remote
+
+#Add OpenAPI submodule & generate OpenAPI types
+init:
+    submodule-init openapi
+
+alias default := init