:card_file_box: Add `read_only` field to `Mount` and `Bind` models

[linkdd]

Decision Record

Whether it is a Docker volume or a bind of a host path, mounts within a Docker container can be either "read only" or "read write".

Using "read only" allow the user to mount the same Docker volume or bind in multiple Docker containers.

Up until now, we were always mounting with "read write" permissions, therefore, for backward compatibility, the new field read_only shall be False by default.

Changes

• [x] :card_file_box: Add read_only field to Mount and Bind models
• [x] :sparkles: Add read_only field to corresponding serializers
• [x] :lipstick: Add read_only column in corresponding tables
• [x] :bookmark: Bump to v1.7.0

[github-actions[bot]]

☂️ Python Coverage

current status: ✅

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Lines	Covered	Coverage	Threshold	Status
2053	2019	98%	90%	✅

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updated for commit: f17c8fa by action🐍