add popup docker-containers-term-popup

[roymath-zz]

Hi - I don't see an obvious way to create a term buffer instead of a shell buffer.. so I wrote the below. Let me know if there is a better way, or if you would like me to submit a PR.

(require 'docker-containers)

(docker-utils-define-popup docker-containers-term-popup
  "Popup for doing M-x `term' to containers."
  'docker-containers-popups
  :actions  '((?a "Term" docker-containers-term-selection)))

(define-key docker-containers-mode-map "a" 'docker-containers-term-popup)

(defun docker-containers-term-selection ()
  "Run `docker-container-term' on the containers selection."
  (interactive)
  (--each (docker-utils-get-marked-items-ids)
    (docker-container-term it)))

(defun docker-container-term (container)
  (interactive (list (docker-read-container-name "container: ")))
  (let ((name (format "*term (docker/%s)*" container)))
	(term "/bin/bash")
	(rename-buffer name)
	(insert (format "docker exec -it %s bash" container))
	(term-send-input)))