Deploy Ruby on Rails apps (+ NGINX) to ECS with Docker - Medium

nginx.conf

# 1.Upstream used to define groups of servers, in this case the rails app, that can be referenced by the proxy_pass
upstream rails_app {
    server app:3000;
}

# 2.Server part
server {  
   # 2.1.Listen to incoming connection on port 80 
   listen 80;
   listen [::]:80;
   return 302 https://$server_name$request_uri;

   # 2.2.Specify your domain. At the moment just localhost
   server_name localhost;   

   # 2.3.Specify the public application root  
   root   $RAILS_ROOT/public;  

   # 2.4.Specify where Nginx should write its logs  
   access_log /var/log/nginx/access.log;  
   error_log /var/log/nginx/error.log;   
  
   # 2.5.Deny requests for files that should never be accessed such as .rb or .log files  
   location ~ /\. {    
      deny all;  
   }
   location ~* ^.+\.(rb|log)$ {    
      deny all;  
   }  
 
   # 2.5.Serve static (compiled) assets directly if they exist (for rails production)
   location ~ ^/(assets|images|javascripts|stylesheets|swfs|system)/   {    
      try_files $uri @rails;     
      access_log off;    
      gzip_static on; 
      expires max;    
      add_header Cache-Control public;     
      add_header Last-Modified "";    
      add_header ETag "";    
      break;  
   } 
  
   # 2.6.send non-static file requests to the app server  
   location / {    
      try_files $uri @rails;  
   }   
   
   # 2.7.reverse proxy redirecting the request to the rails app, port 3000.
   location @rails {    
      proxy_set_header  X-Real-IP  $remote_addr;    
      proxy_set_header  X-Forwarded-For $proxy_add_x_forwarded_for;         
      proxy_set_header Host $http_host;    
      proxy_redirect off;    
      proxy_pass http://rails_app;
      proxy_read_timeout 900;
   }
}