🎋 v3.2.0

Closed issues:

• Multiple media directories for uploads #104
• Persist certificates between container restarts #103

Merged pull requests:

• Bunch of fixes for code submission backend #108 (ali-ramadhan)
• Add ACME volume for nginx-proxy-letsencrypt container #106 (ali-ramadhan)
• Some Django cleanup #97 (ali-ramadhan)
• Plotly.js + MathJax3 hotfix #96 (ali-ramadhan)