ci: add a git.json metadata file during build

.gitea/scripts/build.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+mkdir -p app/static
+
+cp CHANGELOG.md app/static/CHANGELOG.md
+
+cat >app/static/git.json <<EOF
+{
+  "ref": "${GITEA_REF:-}",
+  "ref_name": "${GITEA_REF_NAME:-}",
+  "ref_type": "${GITEA_REF_TYPE:-}",
+  "sha": "${GITEA_SHA:-}",
+  "run_number": "${GITEA_RUN_NUMBER:-}",
+  "server_url": "${GITEA_SERVER_URL:-}",
+  "event_name": "${GITEA_EVENT_NAME:-}",
+  "workflow": "${GITEA_WORKFLOW:-}",
+  "job": "${GITEA_JOB:-}",
+  "commit_message": "${GITEA_COMMIT_MESSAGE:-}",
+  "commit_timestamp": "${GITEA_COMMIT_TIMESTAMP:-}",
+  "branch": "${GITEA_HEAD_REF:-}",
+  "base_branch": "${GITEA_BASE_REF:-}"
+}
+EOF
+
+pnpm build
+
+cp -R packages/ui/build app/build/ui