CURL | Upload multiple html files to confluence

I need to upload html files from Jenkins workspace to confluence via CURL command.

Script used:-

stage('Publish to Confluence') {
          steps {
          withCredentials([usernamePassword(credentialsId: 'confluence', usernameVariable: 'USERNAME', passwordVariable: 'PASSWORD')]) {
          sh '''
          curl -v -S -u $USERNAME:$PASSWORD -X POST -H "X-Atlassian-Token: no-check" -F "file_0=@code/pydoc/manage_connections.html" "https://alm-group.atlassian.net/wiki/spaces/PROJECT/pages/830833705/PyDoc"
          '''
          }}}

Issue is- It is uploading single file as a attachment. I need to upload bunch of files but I am not able to do it.

I followed below link but unable to crack it. https://developer.atlassian.com/cloud/confluence/rest/#api-content-get