added joss label and citation

CITATION.cff

@@ -0,0 +1,36 @@
+cff-version: "1.2.0"
+authors:
+- family-names: Barbie
+  given-names: Alexander
+  orcid: "https://orcid.org/0000-0001-5352-6039"
+- family-names: Hasselbring
+  given-names: Wilhelm
+  orcid: "https://orcid.org/0000-0001-6625-4335"
+contact:
+- family-names: Barbie
+  given-names: Alexander
+  orcid: "https://orcid.org/0000-0001-5352-6039"
+doi: 10.5281/zenodo.13937454
+message: If you use this software, please cite our article in the
+  Journal of Open Source Software.
+preferred-citation:
+  authors:
+  - family-names: Barbie
+    given-names: Alexander
+    orcid: "https://orcid.org/0000-0001-5352-6039"
+  - family-names: Hasselbring
+    given-names: Wilhelm
+    orcid: "https://orcid.org/0000-0001-6625-4335"
+  date-published: 2024-10-16
+  doi: 10.21105/joss.07179
+  issn: 2475-9066
+  issue: 102
+  journal: Journal of Open Source Software
+  publisher:
+    name: Open Journals
+  start: 7179
+  title: "ARCHES PiCar-X: Software for Digital Twin Research"
+  type: article
+  url: "https://joss.theoj.org/papers/10.21105/joss.07179"
+  volume: 9
+title: "ARCHES PiCar-X: Software for Digital Twin Research"

README.md

@@ -1,6 +1,8 @@
 
 # The ARCHES PiCar-X
 
+[![DOI](https://joss.theoj.org/papers/10.21105/joss.07179/status.svg)](https://doi.org/10.21105/joss.07179)
+
 This repository presents the source code for a digital twin prototype of the [PiCar-X by Sunfounder](https://www.sunfounder.com/products/picar-x) based on the [Robot Operating System (ROS)](https://ros.org) and the [ARCHES Digital Twin Framework](https://git.geomar.de/open-source/arches). Our goal is to provide researchers and practitioners with an affordable and straightforward example to explore various concepts of digital twins. Moreover, this example can be used to explore all the concepts implemented in a previous project named ARCHES (Autonomous Robotic Networks to help Human Societies), which focused on monitoring and operating an underwater network of ocean observation systems. This network was successfully tested in the Baltic Sea in October 2020. One of the outcomes of this project was the ARCHES Digital Twin Framework.
 
  The Physical Twin | The Digital Twin Prototype 

docs/index.md

@@ -5,6 +5,10 @@ nav_order: 1
 permalink: /
 ---
 
+<a style="border-width:0" href="https://doi.org/10.21105/joss.07179">
+  <img src="https://joss.theoj.org/papers/10.21105/joss.07179/status.svg" alt="DOI badge" >
+</a>
+
 While digital twins are becoming increasingly important in fields like Industry 4.0 and the Internet of Things (IIoT), there is a significant gap in terms of reproducibility and validation in current digital twin research.
 Despite the increasing interest in digital twin technology, many existing studies fail to provide detailed, reusable, and reproducible specifications and source code, making it difficult for researchers and engineers to replicate or extend these concepts independently.