DockerCompose => Add env var for CPU limit

docker-compose.yml

-version: '3.8'
 services:
     dojo-database:
         container_name: dojo-database
@@ -34,7 +33,7 @@ services:
         deploy:
             resources:
                 limits:
-                    cpus: '3.0'
+                    cpus: ${CPU_LIMIT}
         build:
             context: ./API/
             dockerfile: Dockerfile_ExpressAPI