Add Dockerfile, Drone CI config, fix main class

jshERP-boot/pom.xml

@@ -141,6 +141,9 @@
 			<plugin>
 				<groupId>org.springframework.boot</groupId>
 				<artifactId>spring-boot-maven-plugin</artifactId>
+				<configuration>
+					<mainClass>com.jsh.erp.ErpApplication</mainClass>
+				</configuration>
 				<version>2.0.3.RELEASE</version>
 				<executions>
 					<execution>