feat:#65 increased OCI image base images versions, slightly optimized Dockerfiles and adjust docker-compose.yml's to make them OCI compliant

docker-compose.yml

@@ -43,22 +43,19 @@ services:
       dockerfile: Dockerfile
       context: ./frontend
       target: prod
-    command: "npm run dev"
     # open port 8000
     ports:
       - "8000:8000"
-    volumes:
-      - ./frontend/src:/app/src
 
   rproxy:
-    image: bitnami/nginx:1.25
+    image: docker.io/bitnami/nginx:1.27
     volumes:
       - ./reverseproxy.local.conf:/opt/bitnami/nginx/conf/nginx.conf
     depends_on:
       - htwkalender-data-manager
       - htwkalender-frontend
     ports:
-      - "80:80"
+      - "8080:8080"
 
 volumes:
   pb_data: