Merge branch 'main' into glitch-soc/merge-upstream

Conflicts:
- `.github/workflows/build-image.yml`:
  Upstream entirely refactored this, while we changed the docker repository
  to upload to and disabled the “latest” tag.
  Applied the repository change to `.github/workflows/build-*.yml`, as well
  as disabling native ARMv64 builds.
- `README.md`:
  We have a completely different README.
  Kept ours.
- `app/views/admin/settings/shared/_links.html.haml`:
  Upstream refactored, we had an extra item.
  Refactored as upstream did.
- `spec/controllers/api/v1/timelines/public_controller_spec.rb`:
  Upstream deleted this file, to be replaced by a request spec at
  `spec/requests/api/v1/timelines/public_spec.rb`.
  We had an extra bit about enabling the public timelines because we have
  different defaults than upstream.
  Moved that bit to `spec/requests/api/v1/timelines/public_spec.rb`

spec/controllers/api/v1/timelines/public_controller_spec.rb

@@ -1,60 +0,0 @@
-# frozen_string_literal: true
-
-require 'rails_helper'
-
-describe Api::V1::Timelines::PublicController do
-  render_views
-
-  let(:user) { Fabricate(:user) }
-
-  before do
-    allow(controller).to receive(:doorkeeper_token) { token }
-  end
-
-  context 'with a user context' do
-    let(:token) { Fabricate(:accessible_access_token, resource_owner_id: user.id) }
-
-    describe 'GET #show' do
-      before do
-        PostStatusService.new.call(user.account, text: 'New status from user for federated public timeline.')
-      end
-
-      it 'returns http success' do
-        get :show
-
-        expect(response).to have_http_status(200)
-        expect(response.headers['Link'].links.size).to eq(2)
-      end
-    end
-
-    describe 'GET #show with local only' do
-      before do
-        PostStatusService.new.call(user.account, text: 'New status from user for local public timeline.')
-      end
-
-      it 'returns http success' do
-        get :show, params: { local: true }
-
-        expect(response).to have_http_status(200)
-        expect(response.headers['Link'].links.size).to eq(2)
-      end
-    end
-  end
-
-  context 'without a user context' do
-    let(:token) { Fabricate(:accessible_access_token, resource_owner_id: nil) }
-
-    before do
-      Setting.timeline_preview = true
-    end
-
-    describe 'GET #show' do
-      it 'returns http success' do
-        get :show
-
-        expect(response).to have_http_status(200)
-        expect(response.headers['Link']).to be_nil
-      end
-    end
-  end
-end