Resolve "remove deprecated docker-compose image"

Closes #260 (closed)

i also checked that the kaniko-built images are deployed and running on the server:

• existdb:
  • Published to the subugoe/ahiqar/backend/existdb image repository at 04:25 GMT+0100 on 2023-01-18
  • Configuration digest: sha256:f107a63297c89cd1c0339e7e899d777ba3eeefbac408237e43f4e1339ee13e91
• httpd
  • Published to the subugoe/ahiqar/backend/httpd image repository at 04:25 GMT+0100 on 2023-01-18
  • Configuration digest: sha256:b05a61877ecf2607c4f60f62a75f79cf933f9975c9c6a85e47e055bc76710e16

ahikardocker@swarmnode11:~/test$ docker-compose images
       Container                                    Repository                               Tag       Image Id      Size  
---------------------------------------------------------------------------------------------------------------------------
test_existdb_1            docker.gitlab.gwdg.de/subugoe/ahiqar/backend/existdb             testing   f107a63297c8   293 MB 
test_httpd-prometheus_1   docker.gitlab.gwdg.de/subugoe/ahiqar/backend/apache-prometheus   latest    d32bc99f5255   15.5 MB
test_httpd_1              docker.gitlab.gwdg.de/subugoe/ahiqar/backend/httpd               testing   b05a61877ecf   138 MB