Implemented interaction with docker registry.

registry/nginx/nginx.conf

@@ -0,0 +1,50 @@
+events {
+    worker_connections  1024;
+}
+
+http {
+
+  upstream docker-registry {
+    server registry:5000;
+  }
+
+  ## Set a variable to help us decide if we need to add the
+  ## 'Docker-Distribution-Api-Version' header.
+  ## The registry always sets this header.
+  ## In the case of nginx performing auth, the header is unset
+  ## since nginx is auth-ing before proxying.
+  map $upstream_http_docker_distribution_api_version $docker_distribution_api_version {
+    '' 'registry/2.0';
+  }
+
+  server {
+    listen 80;
+
+    # disable any limits to avoid HTTP 413 for large image uploads
+    client_max_body_size 0;
+
+    # required to avoid HTTP 411: see Issue #1486 (https://github.com/moby/moby/issues/1486)
+    chunked_transfer_encoding on;
+
+    location /v2/ {
+        #auth_request /auth;
+
+      # Do not allow connections from docker 1.5 and earlier
+      # docker pre-1.6.0 did not properly set the user agent on ping, catch "Go *" user agents
+      if ($http_user_agent ~ "^(docker\/1\.(3|4|5(?!\.[0-9]-dev))|Go ).*$" ) {
+        return 404;
+      }
+
+      ## If $docker_distribution_api_version is empty, the header is not added.
+      ## See the map directive above where this variable is defined.
+      add_header 'Docker-Distribution-Api-Version' $docker_distribution_api_version always;
+
+      proxy_pass                          http://registry:5000;
+      proxy_set_header  Host              $http_host;   # required for docker client's sake
+      proxy_set_header  X-Real-IP         $remote_addr; # pass on real client's IP
+      proxy_set_header  X-Forwarded-For   $proxy_add_x_forwarded_for;
+      proxy_set_header  X-Forwarded-Proto $scheme;
+      proxy_read_timeout                  900;
+    }
+  }
+}