feat: 更新README和pkg.sh，提升构建指南和输出信息

pkg.sh

@@ -62,6 +62,7 @@ if [ -n "$BuildWeb" ]; then
 
   npm install --registry https://registry.npmmirror.com
   npm run build
+  echo "===> build web directory: $WebDir"
 fi
 
 # =================== Api
@@ -79,7 +80,8 @@ if [ -n "$BuildApi" ]; then
       cd $ApiDir/$procName
       echo "Make $procName ..."
       make
-  done
+  done 
+  echo "===> build api directory: $ApiDir"
 fi
 
 # =================== ba deb