Octopus 2020.3: Runbooks++, Jenkins Pipelines, and Octopus Linux Docker image

Octopus 2020.3, the third release of the year, introduces several enhancements aimed at improving user experience, including advancements in runbook automation, Jenkins Pipelines support, a streamlined process editor, and early access to an Octopus Linux Docker image. The release adds features like runbook-only projects, enhanced command-line interface support, environment-specific runbook settings, and easier integration with Jenkins, thus simplifying the automation of deployment processes. Additionally, the update offers improvements in configuration management and introduces breaking changes, such as the deprecation of Azure VM extensions and modifications to the Deploy to IIS step, with recommendations for replacements. Available with six months of long-term support, this release also marks the availability of Docker images for Linux, allowing users to self-host Octopus on their preferred operating system, and encourages feedback on this early-access feature.