Change default port of backend to 7007 due to MacOS Control Center update

Signed-off-by: Otto Sichert <git@ottosichert.de>

docs/getting-started/contributors.md

@@ -43,7 +43,7 @@ the project root. Make sure you have run the above mentioned commands first.
 $ yarn dev
 ```
 
-This is going to start two things, the frontend (:3000) and the backend (:7000).
+This is going to start two things, the frontend (:3000) and the backend (:7007).
 
 This should open a local instance of Backstage in your browser, otherwise open
 one of the URLs printed in the terminal.

docs/getting-started/index.md

@@ -37,7 +37,7 @@ guide to do a repository-based installation.
 - `docker` [installation](https://docs.docker.com/engine/install/)
 - `git` [installation](https://github.com/git-guides/install-git)
 - If the system is not directly accessible over your network, the following
-  ports need to be opened: 3000, 7000
+  ports need to be opened: 3000, 7007
 
 ### Create your Backstage App
 

docs/getting-started/running-backstage-locally.md

@@ -70,7 +70,7 @@ cd packages/backend
 yarn start
 ```
 
-That starts up a backend instance on port 7000.
+That starts up a backend instance on port 7007.
 
 In the other window, we will then launch the frontend. This command is run from
 the project root, not inside the backend directory.