heroku + nginx on port 80 - nginx

Question

im trying to start a nginx server on heroku free environmnent. I ready any how-tos and tutorial, but i dont get it running.
First of all, i would like to start nginx as default web-server on Port 80. Afterwards i would like configure nginx as proxy for the underline express server (other heroku instance).
For 4 days i trying to start only nginx on my heroku instance. I always getting the exception that not permitted to start on port 80.
I forked the nginx-buildback (https://github.com/moohkooh/nginx-buildpack) from (https://github.com/benmurden/nginx-pagespeed-buildpack) to adjust some configuration. If i run nginx via heroku bash on port 2555, nginx is starting, but i get connection refused on web-browser.
If i starting nginx via Dyno i getting error message on logs
State changed from starting to crashed
the Procfile of my Dyno
web: bin/start-nginx
My nginx.config.erb
daemon off;
#Heroku dynos have at least 4 cores.
worker_processes <%= ENV['NGINX_WORKERS'] || 4 %>;
events {
use epoll;
accept_mutex on;
worker_connections 1024;
}
http {
gzip on;
gzip_comp_level 2;
gzip_min_length 512;
server_tokens off;
log_format l2met 'measure#nginx.service=$request_time request_id=$http_x_request_id';
access_log logs/nginx/access.log l2met;
error_log logs/nginx/error.log;
include mime.types;
default_type application/octet-stream;
sendfile on;
server {
listen <%= ENV['PORT'] %>;
server_name _;
keepalive_timeout 5;
root /app/www;
index index.html;
location / {
autoindex on;
}
}
}
I also set PORT variable to 80
heroku config:get PORT
80
Some other configuration:
heroku config:get NGINX_WORKERS
8
heroku buildpacks
https://github.com/heroku/heroku-buildpack-multi.git
heroku stack
cedar-14
My .buildpack file
https://github.com/moohkooh/nginx-buildpack
https://codon-buildpacks.s3.amazonaws.com/buildpacks/heroku/ruby.tgz
I also have the guess, that heroku dont use my variable that i set to 80. Whats wrong? Big thanks for anyone.
Btw: my express server running without any error on port 1000 (for test i start it also on port 80 without any errors)

Answer 1

i solved my problem with this configuration.
daemon off;
#Heroku dynos have at least 4 cores.
worker_processes <%= ENV['NGINX_WORKERS'] || 4 %>;
pid nginx.pid;
events {
worker_connections 1024;
}
http {
gzip on;
gzip_comp_level 2;
gzip_min_length 512;
server_tokens off;
log_format l2met 'measure#nginx.service=$request_time request_id=$http_x_request_id';
access_log logs/nginx/access.log l2met;
error_log logs/nginx/error.log;
include mime.types;
server {
listen <%= ENV['PORT'] %>;
server_name localhost;
port_in_redirect off;
keepalive_timeout 5;
root /app/www;
index index.html;
location / {
autoindex on;
}
}
}

Answer 2

For those who are trying to deploy to an NGINX container (React App in my case):
With the help of this docker image I was able to do it. You will need the following in a file called /etc/nginx/conf.d/default.conf.template inside your container:
server {
listen $PORT;
listen [::]:$PORT;
server_name localhost;
location / {
root /usr/share/nginx/html;
index index.html index.htm;
}
}
Then in your Dockerfile, use:
CMD /bin/sh -c "envsubst '\$PORT' < /etc/nginx/conf.d/default.conf.template > /etc/nginx/conf.d/default.conf" && nginx -g 'daemon off;'
Now when you run:
> heroku container:push
> heroku container:release
NGINX will use Heroku's assigned PORT to distribute your application