What's special about port 3838?

[mccalluc]

This patch doesn't work... Is there something else that needs to change for it to talk to port 80?

--- a/context/shiny-server/shiny-server.conf
+++ b/context/shiny-server/shiny-server.conf
@@ -2,7 +2,7 @@ run_as shiny;
 
 server {
   # "listen" needs to match "--publish" target.
-  listen 3838;
+  listen 80;
   location / {
     app_dir /srv/shiny-server/shiny-app/;
     log_dir /var/log/shiny-server;
--- a/docker_run.sh
+++ b/docker_run.sh
@@ -11,6 +11,6 @@ echo $INPUT_JSON
 docker run --env INPUT_JSON \
            --name "$CONTAINER_NAME" \
            --detach \
-           --publish "$PORT:3838" \
+           --publish "$PORT:80" \
            $IMAGE
 echo "Visit http://localhost:$PORT"