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git.stella-ops.org/docs/modules/scanner/operations/entrypoint-lang-nginx.md
master 7b5bdcf4d3 feat(docs): Add comprehensive documentation for Vexer, Vulnerability Explorer, and Zastava modules 
- Introduced AGENTS.md, README.md, TASKS.md, and implementation_plan.md for Vexer, detailing mission, responsibilities, key components, and operational notes.
- Established similar documentation structure for Vulnerability Explorer and Zastava modules, including their respective workflows, integrations, and observability notes.
- Created risk scoring profiles documentation outlining the core workflow, factor model, governance, and deliverables.
- Ensured all modules adhere to the Aggregation-Only Contract and maintain determinism and provenance in outputs.
2025-10-30 00:09:39 +02:00

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Entry-Point Runtime — Nginx

Signals to gather

  • argv0 equals nginx.
  • Config files: /etc/nginx/nginx.conf, conf.d/*.conf, /usr/share/nginx/html.
  • Environment (NGINX_ENTRYPOINT_QUIET_LOGS, NGINX_PORT, NGINX_ENVSUBST_TEMPLATE).
  • Listening sockets on 80/443 (dynamic mode) or EXPOSE 80 (static).
  • Modules or scripts shipped with the official Docker entrypoint (docker-entrypoint.sh collapsing to nginx -g "daemon off;").

Implementation notes

  • Parse nginx.conf (basic directive traversal) to extract worker processes, include chains, upstream definitions.
  • Handle official entrypoint idioms (envsubst templating) via ShellFlow.
  • Distinguish pure reverse proxies from PHP-FPM combos; when both nginx and php-fpm run, classify container as Supervisor.
  • Record static web content presence (/usr/share/nginx/html/index.html).

Evidence & scoring

  • Boost for confirmed config and workers.
  • Add evidence for templating features, env substitution, or modules.
  • Penalise if binary exists without config (likely not the entry point).

Edge cases

  • Alpine images may place configs under /etc/nginx/conf.d; include both.
  • Custom builds might rename binary (openresty, tengine); consider aliases if common.
  • Windows Nginx not supported; fall back to Other.