Docker nginx ENV Example

docker-compose.yml

nginx:
    image: <SNIP>
    container_name: myapp-nginx
    environment:
        MY_HOSTNAME: "myhostname"
    links:
        - php
    ports:
        - "8000:80"
        - "8001:81"
    volumes:
        - "./:/var/app"
        - "./logs/nginx:/var/log/nginx"

Dockerfile-nginx

# ...

# Set default run command
ADD start.sh /opt/start.sh
CMD ["/bin/bash", "/opt/start.sh"]

start.sh

#!/bin/bash

# Replace hostname in config
sed -i "s#localhost#${MY_HOSTNAME}#" /etc/nginx/sites-available/default

# Start nginx
/usr/sbin/nginx