feat:#34 refactored function to intended service, fixed docker files

docker-compose.yml

@@ -15,17 +15,17 @@
 #along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 services:
-  htwkalender-backend:
+  htwkalender-data-manager:
     build:
       dockerfile: Dockerfile
-      context: ./services/backend
+      context: services/data-manager
       target: dev  # prod
     command: "--http=0.0.0.0:8090 --dir=/htwkalender/data/pb_data"
     ports:
       - "8090:8090"
     volumes:
       - pb_data:/htwkalender/data # for production with volume
-      # - ./backend:/htwkalender/data # for development with bind mount from project directory
+      # - ./data-manager:/htwkalender/data # for development with bind mount from project directory
 
   htwkalender-ical:
     build:
@@ -51,7 +51,7 @@ services:
     volumes:
       - ./reverseproxy.local.conf:/opt/bitnami/nginx/conf/nginx.conf
     depends_on:
-      - htwkalender-backend
+      - htwkalender-data-manager
       - htwkalender-frontend
     ports:
       - "80:80"