Merge branch 'update-anvil-guide-2' into 'master'

...nt/guides/anvil/connecting_to_linux_instances_from_mac.md

...uides/anvil/connecting_to_linux_instances_from_windows.md

.../guides/anvil/connecting_to_linux_instances_using_x2go.md

content/guides/anvil/connecting_to_windows_instances.md

content/guides/anvil/creating_an_instance.md

content/guides/anvil/creating_and_attaching_a_volume.md

...guides/anvil/formatting_and_mounting_a_volume_in_linux.md

...ides/anvil/formatting_and_mounting_a_volume_in_windows.md

content/guides/anvil/resizing_an_instance.md

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