Return volume size as a numeric byte count

[felipecruz91]

Originally the size returned by the backend was in human-readable format (e.g. 16.0 kB).

Now the backend returns both the byte count and the human-readable representation of the size of the volume: {"Bytes":16000,"Human":"16.0 kB"}

The human-readable is used in the size column of the table.

[github-actions]

Docker image tag(s) pushed:

felipecruz/vackup-docker-extension:pr-30

Labels added to images:

org.opencontainers.image.title=vackup-docker-extension
org.opencontainers.image.description=Docker Extension to backup and restore docker volumes.
org.opencontainers.image.url=https://github.com/felipecruz91/vackup-docker-extension
org.opencontainers.image.source=https://github.com/felipecruz91/vackup-docker-extension
org.opencontainers.image.version=pr-30
org.opencontainers.image.created=2022-08-03T10:33:23.851Z
org.opencontainers.image.revision=2be1c6a3e2e75ddb8e4c14e288e665feee04f604
org.opencontainers.image.licenses=MIT

[lucbpz]

I don't think I can review go code, but I reviewed the changes in the JS side and the feature is working 👍