update readme.md

build.gradle

@@ -0,0 +1,22 @@
+plugins {
+    id 'java'
+    id 'idea'
+}
+def currVersion = "1.0.0"
+ext.projectIds = ['group': 'org.bdware.sc.contractexample', 'version': currVersion]
+
+tasks.withType(JavaCompile) {
+    options.compilerArgs << '-Xlint:none'
+    options.compilerArgs << '-Xlint:deprecation' << "-Werror"
+}
+
+repositories {
+    mavenCentral()
+}
+project(':backend') {
+    group = "org.bdware.sc.example"
+    version = projectIds.version
+    repositories {
+        maven { url 'https://maven.aliyun.com/repository/public' }
+    }
+}