use lychee for link checking

.github/workflows/link-check.yml

@@ -0,0 +1,19 @@
+name: Check Links
+
+on:
+  pull_request_target:
+    types: [opened, synchronize, reopened]
+
+jobs:
+  check-links:
+    runs-on: ubuntu-latest
+    permissions:
+      pull-requests: write
+      contents: read
+    steps:
+      - uses: actions/checkout@v5
+
+      - uses: lycheeverse/lychee-action@v2
+        id: lychee
+        with:
+          fail: true

.lycheeignore

@@ -0,0 +1,16 @@
+.*%7B.*%7D
+
+https?://receipts(-sandbox)?\.fiskaltrust\.cloud/.*
+https?://pos-api(-sandbox)?\.fiskaltrust\.cloud/.*
+https?://helipad(-sandbox)?\.fiskaltrust\.cloud/.*
+https?://packages(-sandbox)?\.fiskaltrust\.cloud/.*
+https?://signaturcloud(-sandbox)?\.fiskaltrust\.../.*
+https?://rksv(-sandbox)?\.fiskaltrust\.at/.*
+https?://signing(-sandbox)?\.fiskaltrust\.at/.*
+
+https?://github\.com/fiskaltrust/fiskaltrust-instore-app
+https?://github\.com/fiskaltrust/service-possystem-api
+
+https?://next\.orderman\.com
+https://www.raspberrypi.com/products/raspberry-pi-2-model-b
+https://www.legifrance.gouv.fr/codes/article_lc/LEGIARTI000044983827#:~:text=La%20taxe%20est%20exigible%20%3A,%C3%A0%20concurrence%20du%20montant%20encaiss%C3%A9.

README.md

@@ -32,19 +32,18 @@ Anchors can be created like this: `<span id="anchor-name">Referenced Item</span>
 
 ### Tools
 
-#### markdown-link-check
-With [markdown-link-ckeck](https://www.npmjs.com/package/markdown-link-check) you can check a markdown file for incorrect links.
+#### lychee
+With [lychee](https://github.com/lycheeverse/lychee) you can check markdown files for broken links.
 usage:
 ```
-markdown-link-check ./general/general.md
+lychee ./general/general.md
 ```
-> Please note that this tool does not find dead references inside a file. Only dead references to nonexisting files / unreachable URLs.
 
 ## Further public fiskaltrust repositories
 
 The following list shows further fiskaltrust repositories that are important for our customers. 
 
-| **Github repo**                                                                                   | **Goal/Purpose**                                                                                                                                                                                                                            | **Content**                                                                                                                                                                                                                                                                                                                                                                                                             |
-|---------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
-| [fiskaltrust/productdescription-de-doc](https://github.com/fiskaltrust/productdescription-de-doc) | Goal of this repository is to help our customers to get familiar with our products and services for the german market. It should also help our customers apply the products and services described here.                                    | The repository contains descriptions of the offered products and services by fiskaltrust for the german market. It also contains accompanying materials such as how-to guides, price lists, concepts, and presentations that help our customers integrate the offered products and services into their products and services.                                                                                           |
-| [fiskaltrust/faq](https://github.com/fiskaltrust/faq)                                             | The purpose of this repository is to provide information on our customers' frequent questions or concerns.                                                                                                                                  | The repo contains unsorted but tagged question and answer sets. If the answer's content already exists in another public fiskaltrust repository, that content is linked in the solution. The content of this repo is also rendered and presented in the [docs.fiskaltrust](https://docs.fiskaltrust.cloud/doc/faq/qna/market-de.html) portal.                                                                           |
+| **Github repo**                                                                                   | **Goal/Purpose**                                                                                                                                                                                         | **Content**                                                                                                                                                                                                                                                                                                                   |
+|---------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| [fiskaltrust/productdescription-de-doc](https://github.com/fiskaltrust/productdescription-de-doc) | Goal of this repository is to help our customers to get familiar with our products and services for the german market. It should also help our customers apply the products and services described here. | The repository contains descriptions of the offered products and services by fiskaltrust for the german market. It also contains accompanying materials such as how-to guides, price lists, concepts, and presentations that help our customers integrate the offered products and services into their products and services. |
+| [fiskaltrust/faq](https://github.com/fiskaltrust/faq)                                             | The purpose of this repository is to provide information on our customers' frequent questions or concerns.                                                                                               | The repo contains unsorted but tagged question and answer sets. If the answer's content already exists in another public fiskaltrust repository, that content is linked in the solution. The content of this repo is also rendered and presented in the [docs.fiskaltrust](https://docs.fiskaltrust.cloud) portal.            |

doc/general/communication/communication.md

@@ -50,8 +50,8 @@ With the Middleware's _helper_ topology, it is possible to connect the Middlewar
 ### Summary
 The following table displays which protocols are currently available in which country:
 
-| Communication service | AT                         | DE            | FR                         |IT                         |
-|-----------------------|----------------------------|---------------|----------------------------|----------------------------|
+| Communication service | AT                         | DE            | FR                         | IT            |
+|-----------------------|----------------------------|---------------|----------------------------|---------------|
 | **gRPC**              | not yet supported          | **supported** | not yet supported          | **supported** |
 | **REST**              | **supported (via helper)** | **supported** | **supported (via helper)** | **supported** |
 | **WCF**               | **supported**              | **supported** | **supported**              | **supported** |
@@ -61,12 +61,10 @@ As mentioned above, the Middleware versions will be unified in the upcoming vers
 
 ### Sample implementations
 Our latest samples, which demonstrate the communication protocols we recommend for the respective languages, are available here:
-<p align="center">
-  <a href="https://github.com/fiskaltrust/middleware-demo-dotnet"><img src="https://upload.wikimedia.org/wikipedia/commons/thumb/0/0d/C_Sharp_wordmark.svg/120px-C_Sharp_wordmark.svg.png" alt="csharp" /></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
-  <a href="https://github.com/fiskaltrust/middleware-demo-java"><img src="https://upload.wikimedia.org/wikiversity/de/thumb/b/b8/Java_cup.svg/100px-Java_cup.svg.png" alt="java" /></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
-  <a href="https://github.com/fiskaltrust/middleware-demo-node"><img src="https://upload.wikimedia.org/wikipedia/commons/thumb/d/d9/Node.js_logo.svg/100px-Node.js_logo.svg.png" alt="node" /></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
-  <a href="https://github.com/fiskaltrust/middleware-demo-android"><img src="https://upload.wikimedia.org/wikipedia/commons/thumb/d/d7/Android_robot.svg/100px-Android_robot.svg.png" alt="android" /></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
-  <a href="https://github.com/fiskaltrust/middleware-demo-postman"><img src="https://avatars3.githubusercontent.com/u/10251060?s=100&v=4" alt="node" /></a>
-</p>
+
+| C#                                                                                                | Java                                                                                      | Node.js                                                                                          | Android                                                                                              | Postman                                                                                         |
+|---------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------|
+| :--:                                                                                              | :----:                                                                                    | :-------:                                                                                        | :-------:                                                                                            | :-------:                                                                                       |
+| [![C#](./images/C_Sharp_wordmark.svg.png)](https://github.com/fiskaltrust/middleware-demo-dotnet) | [![Java](./images/Java_cup.svg.png)](https://github.com/fiskaltrust/middleware-demo-java) | [![Node.js](./images/Node.js_logo.svg.png)](https://github.com/fiskaltrust/middleware-demo-node) | [![Android](./images/Android_robot.svg.png)](https://github.com/fiskaltrust/middleware-demo-android) | [![Postman](./images/postman-logo.png)](https://github.com/fiskaltrust/middleware-demo-postman) |
 
 Additionally, other samples (including legacy ones) can be found in our [demo repository](https://github.com/fiskaltrust/demo).