[TASK] Move automatic deployment to TYPO3 explained

[linawolf]

Chapter needs more love in general: #498

Manually backported to 12.4

Releases: main, 13.4, 12.4

[github-actions]

The backport to 12.4 failed:

The process '/usr/bin/git' failed with exit code 1

stderr

The previous cherry-pick is now empty, possibly due to conflict resolution.
If you wish to commit it anyway, use:

    git commit --allow-empty

Otherwise, please use 'git cherry-pick --skip'

stdout

Auto-merging Documentation/Installation/DeployTYPO3.rst
On branch backport-501-to-12.4
You are currently cherry-picking commit 7772afa.
  (all conflicts fixed: run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

nothing to commit, working tree clean

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-12.4 12.4
# Navigate to the new working tree
cd .worktrees/backport-12.4
# Create a new branch
git switch --create backport-501-to-12.4
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick 7772afaac485473a872605cf3309502598071b62
# Push it to GitHub
git push --set-upstream origin backport-501-to-12.4
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-12.4

Then, create a pull request where the base branch is 12.4 and the compare/head branch is backport-501-to-12.4.