Merge pull request #5091 from adamdmharvey/new-doco

docs: Add key concepts

docs/getting-started/concepts.md

@@ -0,0 +1,21 @@
+---
+id: concepts
+title: Key Concepts
+# prettier-ignore
+description: High level key concepts used in the Backstage project
+---
+
+For users of Backstage, there are certain concepts which are central to its
+design and functionality. Being an expert in each of these concepts is not
+necessary, however having a base understanding of each will make administering,
+configuring, and operating Backstage easier.
+
+- CHANGELOG - https://keepachangelog.com
+- Docker - https://www.docker.com/
+- Monorepo - https://semaphoreci.com/blog/what-is-monorepo
+- Node.js - https://nodejs.org
+- React - https://reactjs.org
+- Semantic Versioning - https://semver.org
+- TypeScript - https://www.typescriptlang.org
+- YAML - https://yaml.org
+- Yarn - https://www.pluralsight.com/guides/yarn-a-package-manager-for-node-js

docs/getting-started/index.md

@@ -42,6 +42,13 @@ this process in [Create an app](./create-an-app.md).
 
 ### Contributing to Backstage
 
+If you intend to make changes to the core project's packages, certain plugins,
+or project documentation, then you can fork and clone
+[https://github.com/backstage/backstage](https://github.com/backstage/backstage).
+
+This will let you run the latest code off of the `master` branch, fix bugs or
+contribute new features, run test suites, etc.
+
 You can read more in our
 [CONTRIBUTING](https://github.com/backstage/backstage/blob/master/CONTRIBUTING.md)
 guide, which can help you get setup with a Backstage development environment.

microsite/sidebars.json

@@ -33,6 +33,7 @@
         ]
       },
       "getting-started/keeping-backstage-updated",
+      "getting-started/concepts",
       "getting-started/contributors"
     ],
     "CLI": ["cli/index", "cli/commands"],