[NonGNU ELPA] Dockerfile-Mode version 1.7

[ELPA update]

Version 1.7 of package Dockerfile-Mode has just been released in NonGNU ELPA.
You can now find it in M-x list-packages RET.

Dockerfile-Mode describes itself as:

  ===========================================
  Major mode for editing Docker's Dockerfiles
  ===========================================

More at https://elpa.nongnu.org/nongnu/dockerfile-mode.html

## Summary:

  Provides a major mode `dockerfile-mode' for use with the standard
  `Dockerfile' file format.  Additional convenience functions allow

## Recent NEWS:

[Not provided 🙁]