nginx conf

default.conf

# Basic conf
server {
	server_name  _;
	return 302 $scheme://mysite.test$request_uri;
}

# Custom conf
server {
	server_name ~^(.*)\.mysite\.test$ mysite.test;
	root /app/public/;

	# If file ends with these extensions
	location ~* ^.+\.(svg|svgz|jpg|jpeg|gif|png|ico|bmp|webp)$ {
		try_files $uri @image_fallback; # Try this address (defined below)
	}

	# Define URL to try (prod url)
	location @image_fallback {
		proxy_pass https://mysite.com;
	}

	# More default conf...
	index index.php index.html index.htm;
	include do-not-modify/*.conf;
}