Add AWS_REGION in code sample for S3 bucket

[yirenlu92]

• Add AWS_REGION in code sample for S3 bucket

[mwaskom]

What effect does this have?

[thundergolfer]

Agree with @mwaskom's question. What's the region of (the bucket) and how do you find the region for the bucket. The other two key-values are more self-explanatory, but arguably could also get documented.

[luiscape]

Mountpoint supports AWS_REGION as a parameter. The main use-case seems to be resolving issues that may happen with "cross-region mount with a directory bucket", among other things.

Seems fair to add it as an optional env var.

[mwaskom]

This was just a genuine question on my end; it’s not clear from the example what this is supposed to accomplish. (Are you setting the region you are connecting from? The region you want to mount in? Etc.)

[mwaskom]

Thanks for adding the comments, makes a lot more sense.

So that they remain readable, can we move the comments to a line above the parameter and wrap them at a reasonable character width?

[mwaskom]

Thanks for bearing with me :)