3cloud-backend/docs/curl to launch containers.md

curl -X POST http://192.168.64.2:5000/api/workloads/containers -H "Content-Type: application/json" -d '{ "virtual_data_center": "b1d09477-742b-485e-87c3-5dad36dd4f9e", "containers": [ { "docker_image": "joke_container", "container_name": "very-important-webserver", "ports": [ { "internal": 9090, "external": 9090, "use_dns": false } ], "env": { "PORT": "9090" } }, { "docker_image": "whoami81", "container_name": "whoami-server", "ports": [ { "internal": 81, "external": 8081, "use_dns": false } ] } ] }'