Update spring-boot 2.4.2 , update config

src/main/java/com/monkeyk/sos/web/context/SOSServletContextAware.java

@@ -0,0 +1,24 @@
+package com.monkeyk.sos.web.context;
+
+import com.monkeyk.sos.web.WebUtils;
+import org.springframework.stereotype.Component;
+import org.springframework.web.context.ServletContextAware;
+
+import javax.servlet.ServletContext;
+
+/**
+ * 2021/10/23 12:16 PM
+ *
+ * @author Shengzhao Li
+ * @since 2.1.1
+ */
+@Component
+public class SOSServletContextAware implements ServletContextAware {
+
+
+    @Override
+    public void setServletContext(ServletContext servletContext) {
+        //主版本号
+        servletContext.setAttribute("mainVersion", WebUtils.VERSION);
+    }
+}