build.sh: give the container a name EnglishPal.

build.sh

@@ -0,0 +1,17 @@
+#!/bin/sh
+
+cd /home/lanhui/englishpal
+
+# Stop service
+sudo docker stop EnglishPal
+
+# Rebuild container. Run this after modifying the source code.
+sudo docker build -t englishpal .
+
+# Run the application
+sudo docker run -d --name EnglishPal -p 90:80 -v /home/lanhui/englishpal/app/static/frequency:/app/static/frequency -t englishpal  # for permanently saving data
+
+# Save space.  Run it after sudo docker run
+sudo docker system prune -a -f
+
+