Unable to rebuild discourse

i have same result

root@amsaal:/var/discourse# cat .git/config
[core]
repositoryformatversion = 0
filemode = true
bare = false
logallrefupdates = true
[remote “origin”]
url = GitHub - discourse/discourse_docker: A Docker image for Discourse · GitHub
fetch = +refs/heads/:refs/remotes/origin/
[branch “main”]
remote = origin
merge = refs/heads/main

And git status

root@amsaal:/var/discourse# git status
On branch main
Your branch is based on ‘origin/main’, but the upstream is gone.
(use “git branch --unset-upstream” to fixup)

Changes not staged for commit:
(use “git add …” to update what will be committed)
(use “git restore …” to discard changes in working directory)
modified: .github/workflows/build.yml
modified: LICENSE
modified: README.md
modified: templates/postgres.13.template.yml
modified: templates/postgres.15.template.yml
modified: templates/postgres.template.yml
modified: templates/web.ssl.template.yml
modified: templates/web.template.yml

Untracked files:
(use “git add …” to include in what will be committed)
rebuild.log

no changes added to commit (use “git add” and/or “git commit -a”)