Update Dockerfile

Author: nagulmeeramd

Dockerfile

@@ -2,6 +2,6 @@
 FROM tomcat:8.0-alpine
 # Debugging tools: A few ways to handle debugging tools.
 # Trade off is a slightly more complex volume mount vs keeping the image size down.
-COPY target/demo.war /usr/local/tomcat/webapps/demo.war
+ADD target/demo.war /usr/local/tomcat/webapps/demo.war
 EXPOSE 8080
 CMD ["catalina.sh", "run"]