Nginx Configuration¶

The image ships with a single nginx.conf that powers one server block on port 8080. Every common setting is templated from environment variables at container start through envsubst.

File layout¶

/etc/nginx/
├── nginx.conf                 # main file, envsubst'd at startup
├── conf.d/                    # extra http{} includes (real-ip, global rules)
└── server-conf.d/             # extra server{} includes (per-route rules)

You have two extension points depending on where the snippet needs to go:

Directory	Include location	Use for
`/etc/nginx/conf.d/*.conf`	inside `http {}`	upstreams, global directives, additional `server {}` blocks, trusted proxy setup
`/etc/nginx/server-conf.d/*.conf`	inside the default `server {}`	custom `location` blocks, rewrites, auth rules that apply to the main site

This split was added in response to #29 so you don't have to replace the whole nginx.conf.

Mounting snippets¶

docker run --rm -p 8080:8080 \
  -v "$PWD/my-location.conf:/etc/nginx/server-conf.d/my-location.conf:ro" \
  erseco/alpine-php-webserver

Compose:

services:
  web:
    image: erseco/alpine-php-webserver
    volumes:
      - ./app:/var/www/html
      - ./nginx/my-location.conf:/etc/nginx/server-conf.d/my-location.conf:ro

Example my-location.conf:

location /api/ {
    try_files $uri /api/index.php$is_args$args;
}

location /static/ {
    expires 30d;
    access_log off;
}

Overriding the default `location /`¶

The default server block includes:

location / {
    try_files $uri $uri/ /index.php$is_args$args;
}

This works for WordPress, Symfony, Laravel and most front-controller frameworks. If you need something radically different, set DISABLE_DEFAULT_LOCATION=true and provide your own location / via /etc/nginx/server-conf.d/ (#43):

services:
  web:
    image: erseco/alpine-php-webserver
    environment:
      DISABLE_DEFAULT_LOCATION: "true"
    volumes:
      - ./app:/var/www/html
      - ./nginx/custom-root.conf:/etc/nginx/server-conf.d/custom-root.conf:ro

custom-root.conf:

location / {
    return 200 "Custom root handler\n";
    add_header Content-Type text/plain;
}

How DISABLE_DEFAULT_LOCATION works

At startup, the entrypoint comments out the default location / { ... } block in nginx.conf with sed. It does not touch anything else. Your replacement must live in server-conf.d/, which is included later in the same server block.

Clean URLs for Symfony / Laravel¶

The image already uses a Symfony-friendly try_files with $is_args$args (#55):

try_files $uri $uri/ /index.php$is_args$args;

No ?q= parameter pollution. PATH_INFO is populated correctly by the PHP location block. Nothing extra to configure for Symfony 5/6/7, Laravel, WordPress or plain PHP front-controllers.

Full file replacement¶

If you really need a different nginx.conf, mount your own over /etc/nginx/nginx.conf. Note that it will still be passed through envsubst, so ${var} references must match defined env vars or be escaped.

docker run --rm -p 8080:8080 \
  -v "$PWD/nginx.conf:/etc/nginx/nginx.conf:ro" \
  erseco/alpine-php-webserver

Large uploads¶

Three variables must be raised together:

environment:
  client_max_body_size: 100M   # Nginx
  post_max_size:        100M   # PHP
  upload_max_filesize:  100M   # PHP
  memory_limit:         256M   # PHP (must exceed post_max_size)

Long-running scripts¶

Bump both Nginx and PHP:

environment:
  fastcgi_read_timeout: 300s
  fastcgi_send_timeout: 300s
  max_execution_time:    300

Gzip is already on¶

The default config enables gzip for the full Cloudflare-recommended MIME list. There is nothing to turn on.