tell blockexplorer to run on port 8080 (#3237)

* tell blockexplorer to run on port 8080

* forward port 80 to 5000 for a blockexplorer node

net/scripts/install-socat.sh

@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+#
+# socat setup for
+#
+set -ex
+
+[[ $(uname) = Linux ]] || exit 1
+[[ $USER = root ]] || exit 1
+
+apt-get --assume-yes install socat