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Re:Show HN: “Install on DigitalOcean” button for open source... by timmorgan on Friday October 31, 2014 @12:01PM (#8539474)
This tool is built to interface with DigitalOcean's API so it can spin up the VM.

There is no universal API for Docker that would allow one to install "anywhere that has docker", at least as far as I know.

Re:Show HN: “Install on DigitalOcean” button for open source... by Gigablah on Friday October 31, 2014 @12:17PM (#8539558)
Maybe not Docker itself, but this looks like a use case for CoreOS. In this case the "install button" would simply submit fleet unit file(s).
Re:Show HN: “Install on DigitalOcean” button for open source... by timmorgan on Friday October 31, 2014 @12:20PM (#8539576)
Thanks for this comment -- reminds me I need to look into CoreOS some more.