Nginx

Serves static files and passes PHP to FPM. Every PHP project has one — Drupal, Laravel, WordPress or plain PHP — and a Node.js or Go project has none, because the application answers HTTP itself.

What it serves is decided by your project type, not by a setting:

The code is mounted read-only; uploads are served from the files directory that outlives the release. In front of Nginx is the platform's proxy, which terminates TLS and routes the hostname — or Varnish, when the stack runs it.

A slow request passes through Nginx before it reaches PHP, and whichever gives up first answers. Raise NGINX_FASTCGI_READ_TIMEOUT together with PHP_MAX_EXECUTION_TIME — see Service settings.

#Versions

A deprecated version still runs and is still what some sites are on. It is listed so you can move before it goes, rather than finding out on the morning a build stops resolving it.

Pin the version, not the build: name 1.31 and the platform matches it to the current build, so a security rebuild reaches you without anybody editing a repository.

#What you can change

In vallic.yaml — what each one does is on Service settings:

services:
  - nginx:
      version: '1.31'
      environment:
        NGINX_CLIENT_MAX_BODY_SIZE: …
        NGINX_KEEPALIVE_TIMEOUT: …
        NGINX_FASTCGI_READ_TIMEOUT: …
        NGINX_GZIP_COMP_LEVEL: …
        NGINX_STATIC_EXPIRES: …
        NGINX_ERROR_LOG_LEVEL: …
        NGINX_DRUPAL_NOT_FOUND_REGEX: …
        NGINX_WP_NOT_FOUND_REGEX: …

Anything not on this list refuses the deploy, naming the variable — rather than being accepted and quietly ignored.