Fix typo in Dockerfile VOLUME

[mnixry]

It acts to create a directory mount at "/[/var/lib/mysql/]/", which is definitely not we want.

[kou]

Wow, really? How did you check it?

[kou]

Ah, we need a quote to make the path a valid JSON array?

[mnixry]

Wow, really? How did you check it?

You can use docker inspect -f '{{ .Mounts }}' <container name> to check it:

The first volume is manually attached (configured in docker-compose), and the second volume is automatically created by the VOLUME statement in the Dockerfile.

If you exec into the container, you'll find a folder named [ in the root directory:

Do we need quotes to make the path a valid JSON array?

Not really necessary. Statements like VOLUME /var/lib/mysql or VOLUME ["/var/lib/mysql"] are both acceptable. Since the official Docker MySQL image already declares the same volume location, this line may not be required now.

[kou]

Thanks. I see.
I'll merge this.

Since the official Docker MySQL image already declares the same volume location, this line may not be required now.

In my understanding, we need VOLUME because the official image has it.