adapted new image name in docker-compose

src/main/docker/gitsearch.yml

 version: '3.5'
 services:
   gitsearch-app:
-    image: sharing-codeability.uibk.ac.at:5051/sharing/codeability-sharing-platform
+    image: sharing-codeability.uibk.ac.at:5051/sharing/codeability-sharing-platform/gitsearch
     container_name: sharing_search
     environment:
       - _JAVA_OPTIONS=-Xmx512m -Xms256m