Use Octopus.Tentacle.CrossPlatformBundle.Server to reduce installer/image size

[acodrington]

Prerequisites

• I have searched open and closed issues to make sure it isn't already requested
• My team has started working on this issue
• I have written a descriptive issue title

The enhancement

The Need

The Octopus.Server Windows installer and Linux Docker image have grown to ~1.5GB. More than 50% of this bulk is from Octopus.Tentacle.CrossPlatformBundle, which is how Octopus Server can update connected Tentacles to the latest bundled version.

However, Octopus Server only uses a small minority of the files in the CrossPlatformBundle. Other files are used for integration tests and configuring development environments, but are otherwise not required.

Solution

We have created a new 'slim' version of the bundle called Octopus.Tentacle.CrossPlatformBundle.Server that only contains the minimum Tentatcle artifacts required by Octopus Server. This new bundle is only 25% as large as the original, reducing that overall Octopus Server installer/image size by almost half!