nginx http https reverse proxy server

gistfile1.txt

#Replace /usr/local/etc/nginx/nginx.conf with this. This is the
# default location for Nginx according to 'nginx -h'
worker_processes 1;
error_log /etc/nginx/error.log;

events {
  worker_connections  1024;
}

http {
  upstream nodejsservers {
    ip_hash;
    server localhost:31333;
  }
   
  # This should be in the same directory as this conf
  # e.g. /usr/local/etc/nginx
  include       mime.types;
  default_type  application/octet-stream;
  # Note this log_format is named 'main', and is used with the access log below
  log_format   main '$remote_addr - $remote_user [$time_local]  $status '
    '"$request" $body_bytes_sent "$http_referer" '
    '"$http_user_agent" "$http_x_forwarded_for"';

  sendfile        on;
  keepalive_timeout  65;

  # Without this I got this error: 'upstream sent too big header
  # while reading response header from upstream'
  proxy_buffer_size   128k;
  proxy_buffers   4 256k;
  proxy_busy_buffers_size   256k;
  
  server {
    server_name .example.net;
    return 301 https://www.example.com$request_uri;
  }
  
  server {
      root /home/user/project/;
      listen 443 ssl;
      ssl on;
      ssl_certificate /home/user/project/config/ssl/server.crt;
      ssl_certificate_key /home/user/project/config/ssl/server.key;
      server_name .example.com;
      keepalive_timeout   70;
      access_log /etc/nginx/nodeApp2.access.log  main;
      client_max_body_size 10M;
      gzip on;
      gzip_comp_level 6;
      gzip_vary on;
      gzip_min_length  1000;
      gzip_proxied any;
      gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript;
      gzip_buffers 16 8k;
      proxy_set_header Host $host;
      proxy_set_header X-Scheme $scheme;
      proxy_set_header X-Forwarded-SSL on;
      proxy_set_header X-Forwarded-Proto $scheme; #http pr https
      proxy_set_header X-Real-IP $remote_addr;
      proxy_ssl_session_reuse off;

      location /dashboard {
        try_files $uri /build/dashboard/index.html;
      }

      location /api {
         proxy_pass http://localhost:1337/api;
         proxy_ssl_certificate /home/user/project/config/ssl/server.crt;
         proxy_ssl_certificate_key /home/user/project/config/ssl/server.key;
         proxy_ssl_trusted_certificate /home/user/project/config/ssl/server.ca;
         proxy_ssl_protocols           TLSv1 TLSv1.1 TLSv1.2;
         proxy_ssl_ciphers             HIGH:!aNULL:!MD5;
         proxy_ssl_verify        on;
         proxy_ssl_verify_depth  2;
         proxy_ssl_session_reuse on;
      }
   
      location ~ ^/css/(.*)\.(css|gif|png)$ {
         root   /home/user/project/public/assets/;
         expires 1M;
         access_log off;
         add_header Cache-Control "public";
      } 

      location ~ ^/js/(.*)\.(js)$ {
         root   /home/user/project/public/assets/;
         expires 1M;
         access_log off;
         add_header Cache-Control "public";
      }

      location ~ ^/images/(.*)\.(png|jpg|jpeg|ico)$ {
         root   /home/user/project/public/assets/;
         expires 1M;
         access_log off;
         add_header Cache-Control "public";
      }

      location ~ ^/fonts/(.*)\.(eot|svg|ttf|woff|woff2|otf)$ {
         root   /home/user/project/public/assets/;
         expires 1M;
         access_log off;
         add_header Cache-Control "public";
      } 

      location ~ ^/uploads/(.*)\.(jpg|jpeg|gif|png|ico|zip|tgz|gz|rar|bz2|pdf|txt|tar|wav|bmp|rtf)$ {
         root   /home/user/project/public/;
         expires 1M;
         access_log off;
         add_header Cache-Control "public";
      }

      location ~* ^.+\.(jpg|jpeg|png)$ {
         root /home/user/project/;
         expires 1M;
         access_log off;
         add_header Cache-Control "public";
      }

      location /build/ {
        alias /home/user/project/build/;
        expires 30d;
      }

      location /docs/ {
      	auth_basic "Restricted";
      	auth_basic_user_file /etc/nginx/.htpasswd;
      	#auth_basic_user_file /usr/local/etc/nginx/.htpasswd;
      	alias /home/user/project/docs/;
      	expires 30d;
      }
 
      location / {
        proxy_pass http://localhost:1337;
        proxy_set_header Host             $host;
        proxy_set_header X-Real-IP        $remote_addr;
        proxy_set_header X-Forwarded-For  $proxy_add_x_forwarded_for;
        proxy_set_header X-Accel-Internal /internal-nginx-static-location;
      }
   }

}