chore(readme): replace with readme linking to docs repo

README.md

-# Moodle Dockerized Code Testing (MoDoCoT) - Backend
+# DTT Backend
 
-## Usage
-An available Jenkins needs to run on the server where the backend container runs.
-The Jenkins has to listen on port 8080.
-If need to use another port for Jenkins have a look at Server application configuration / Local application configuration
+This is the source code repository for the DTT backend server.
 
-### Conventions
-- The JUnit test classes cannot be organized in packages. Tasks and helper classes can use packages.
+Documentation for this is done with GitLab Pages using MkDocs and is available here:  
+[https://transfer.hft-stuttgart.de/pages/dtt/][pages-link]
 
-## Development Hints
-### Build
-This is a maven project. It can be build with `mvn package`.
-
-There is also a ready-to-go docker image available. It can be found [on Docker Hub](https://hub.docker.com/r/hftstuttgart/modocot-backend/)
-
-### Server application configuration
-We're using the **application-server.properties** file to configure the application.
-The file can be found under _/src/main/resources/_
-
-You need to configure following entries:  
-docker.hostIp= "Your docker host ip"
-jenkins.api.token= "Your jenkins api token" [See Jenkins Doc](https://www.jenkins.io/doc/book/using/remote-access-api/)
-(jenkins.url=http://${docker.hostIp}:"Your Jenkins Port"/) Use this property if your Jenkins listens on a port other than 8080
-
-### Local application configuration
-We're using the **application.properties** file to configure the application.
-The file can be found under _/src/main/resources/_
-
-You need to configure following entries:  
-docker.hostIp= "Your docker host ip"
-jenkins.api.token= "Your jenkins api token" [See Jenkins Doc](https://www.jenkins.io/doc/book/using/remote-access-api/)
-(jenkins.url=http://${docker.hostIp}:"Your Jenkins Port"/) Use this property if your Jenkins listens on a port other than 8080
-
-## Interfaces
-##### POST /v1/unittest
-Used for uploading / creating of assignments. The body needs to contain two fields as form data:<br/>
-*assignmentId*: The ID of the created assignment. This is created by moodle.<br/>
-*unitTestFile*: The zip file containing the unit tests for this assignment.
-
-##### DELETE /v1/unittest?assignmentId=<111>
-Delete the created assignment. The assignment ID of the unit tests which need to be deleted is passed as a query parameter
-
-##### POST /v1/task
-The upload of the Java files to be tested. The body needs to contain two form fields:<br/>
-*taskFile*: The zip file containing the java files<br/>
-*assignmentId*: The id of the assignment. Provided by moodle
-
-## Further development
-For pushing the backend to Dockerhub you need to provide the Dockerhub-Credentials inside your Jenkins with the naming "Dockerhub"
-You also need to create a Jenkins-pipline which is builds and deploys this repository.
+If you don't want to open the Webpage or it is not available for whatever reason,
+the documentation root is found [here][docs-root]
 
+[docs-root]: https://transfer.hft-stuttgart.de/gitlab/dtt/documentation/-/blob/master/docs/index.md
+[pages-link]: https://transfer.hft-stuttgart.de/pages/dtt/