Update Dockerfile

Dockerfile

@@ -4,13 +4,11 @@ FROM justadudewhohacks/opencv-nodejs
 # 设置工作目录
 WORKDIR /usr/src/app
 
-# 安装Git和CMake顺便更新nodejs
+# 安装Git和CMake顺便更新nodejs和npm
 RUN apt-get update && \
     apt-get install -y git cmake && \
-    apt upgrade -y nodejs
-
-# 更新npm
-RUN npm install -g npm
+    apt install nodejs && \
+    apt install npm
 
 # 安装OpenCV
 RUN apt-get install -y libopencv-dev