chore: upgrade app to nginx 1.31.3
cc-ci/testme cc-ci: success
cc-ci lvl5 P4 demo: deliberate lint violation (do not merge)
cc-ci/testme cc-ci: success
V5/V6 stale-test verification - custom-html docroot move (DO NOT MERGE)
cc-ci/testme cc-ci: failure
chore: upgrade to 1.13.0+1.31.1
cc-ci/testme cc-ci: failure
chore: upgrade to 1.13.0+1.31.1
cc-ci/testme cc-ci: success