Fix: clean workspace before clone

Jenkinsfile

@@ -10,6 +10,7 @@ pipeline {
         stage('Checkout') {
             steps {
                 echo 'Checkout code from Gitea...'
+                sh 'rm -rf *'
                 sh 'git clone ${GITEA_REPO} .'
                 sh 'git checkout ${BRANCH_NAME}'
             }