fix image links in docs

docs/20_Server/Processes/10_Build.md

@@ -12,7 +12,7 @@ A build is denied if a project has no activated phase the project settings.
 
 ## Overview ##
 
-![Build process](./../../../../images/processes-build.png "Build process")
+![Build process](/images/processes-build.png "Build process")
 
 ## Steps ##
 

docs/_index.md

@@ -58,8 +58,8 @@ This project is related to
 
 The overview over all projects is the starting page after login. It shows all projects and which build is rolled out to which phase.
 
-![Project overview](./../images/screenshot_overview_all_projects.png)
+![Project overview](/images/screenshot_overview_all_projects.png)
 
 The project overview for a single project:
 
-![Project overview](./../images/screenshot_overview_project.png)
+![Project overview](/images/screenshot_overview_project.png)