Initial container setup

Dockerfile

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+FROM nginx
+
+ENV SOCKET_SERVER socket_server
+COPY nginx.conf /etc/nginx/nginx.conf
+COPY run.sh /
+
+CMD ["bash", "/run.sh"]

nginx.conf

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+user  nginx;
+worker_processes  1;
+daemon off;
+
+error_log  stderr warn;
+pid        /var/run/nginx.pid;
+
+events {
+    worker_connections  1024;
+}
+
+http {
+    include       /etc/nginx/mime.types;
+    default_type  application/octet-stream;
+
+    log_format elb_log '$proxy_protocol_addr - $remote_user [$time_local] '
+                       '"$request" $status $body_bytes_sent "$http_referer" '
+                       '"$http_user_agent"';
+
+    access_log /dev/stdout  elb_log;
+
+    server {
+        listen 80;
+        proxy_http_version 1.1;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header Host $host;
+
+        location / {
+            proxy_pass http://SOCKET_SERVER;
+            proxy_set_header Upgrade $http_upgrade;
+            proxy_set_header Connection "upgrade";
+            proxy_cache_bypass $http_upgrade;
+        }
+    }
+
+    sendfile        on;
+    keepalive_timeout  65;
+    include /etc/nginx/conf.d/*.conf;
+}

run.sh

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+#!/bin/bash
+
+sed -i "s/SOCKET_SERVER/${SOCKET_SERVER}/g" /etc/nginx/nginx.conf
+nginx