add build script

build.sh

@@ -1,6 +1,7 @@
 rm -rf src/main/webapp/static/*
 rm -rf src/main/webapp/WEB-INF/html/admin.html
 git checkout .
+git pull
 (cd src/main/vue && npm run build)
 mvn package
 /usr/local/tomcat/shouyoudianjing/bin/shutdown.sh -force