This is an ubuntu based nginx image that allows you to a reverse proxy setup.
You can run this image with:
docker run -d -p 80:80 -v sites/:/etc/nginx/sites-enabled nginx
I'm using a simple template engine with bash, so you need to write the env variables and bash will replace it with the values. you can set VERBOSE_TEMPLATES to debug the templates.
Also you need to escape any $ character with \$