Title says it all. Prior to installing composer with a “command” in my compose.yml file
my PHP and NGinX stack was working fine. phpinfo would display on my test page. Now I just get a 502 bad gateway error. If I comment out the “command” in my .yml file it works again.

NGinX .conf file looks like this:

server {
    listen 80 default_server;
    listen [::]:80 default_server;
    
    server_name localhost;

    root /app;
    index index.php index.html;

    location / {
        fastcgi_buffers 8 16k; # increase the buffer size for PHP-FTP
        fastcgi_buffer_size 32k; # increase the buffer size for PHP-FTP
        fastcgi_connect_timeout 60;
        fastcgi_send_timeout 300;
        fastcgi_read_timeout 300;
  
        try_files $uri $uri/ /index.php?$args;
    }

    location ~* .php$ {
        fastcgi_pass php:9000;
        include fastcgi_params;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        fastcgi_param SCRIPT_NAME $fastcgi_script_name;
    }
    
        # Logs for Nginx access and errors
        access_log /var/log/nginx/access.log;
        error_log /var/log/nginx/error.log;
        
        # deny access to .htaccess/.htpasswd files
        location ~ /.ht {
        deny all;
    }
}

compose.yml file looks like this:

version: '3.8'

services:
    NGinX:
        image: nginx:latest
        container_name: NGinX
        hostname: NGinX
        security_opt:
            - no-new-privileges:true
        ports:
            - 6080:80/tcp
            - 6443:443/tcp
        dns:
            - 8.8.8.8
            - 1.1.1.1
        environment:
            - PUID=1000
            - PGID=100
            - TZ=Europe/London
            - UMASK=022
        volumes:
            - /volume1/docker/WebDev/NGinX/nginx.conf:/etc/nginx/conf.d/nginx.conf
            - /volume1/docker/WebDev/NGinX/Logs:/var/log/nginx
            -  /volume1/docker/WebDev/WWW:/app
        restart: unless-stopped

        depends_on:
            - php


    php:
        build:
            context: .
            dockerfile: PHP.dockerfile
        tty: true
        container_name: PHP
        hostname: PHP
        security_opt:
            - no-new-privileges:true
        ports:
            - 9000:9000
        environment:
            - PUID=1000
            - PGID=100
            - TZ=Europe/London
            - UMASK=022
        volumes:
            - /volume1/docker/WebDev/WWW:/app
            - /volume1/docker/WebDev/PHP/local-php.ini:/usr/local/etc/php/conf.d/local.ini
        # run composer install command  here instead of in the dockerfile to avoid volume  mounting overwriting the  vendor folder
        command: composer run-script serve
        restart: unless-stopped

NGinX error log:
2024/07/20 12:48:32 [error] 23#23: *30 connect() failed (111: Connection refused) while connecting to upstream, client: 192.168.64.1, server: localhost, request: “GET / HTTP/1.1”, upstream: “fastcgi://192.168.64.2:9000”, host: “192.168.1.152:6080”
2024/07/20 12:48:32 [error] 23#23: *30 connect() failed (111: Connection refused) while connecting to upstream, client: 192.168.64.1, server: localhost, request: “GET /favicon.ico HTTP/1.1”, upstream: “fastcgi://192.168.64.2:9000”, host: “192.168.1.152:6080”, referrer: “http://192.168.1.152:6080/”