fix pynode dockerfile

docker/py+npm.dockerfile

@@ -1,20 +1,14 @@
 # dobromirpopov/pynode
 FROM python:slim
 
-# System dependencies
-RUN apt-get update && apt-get install -y git && apt-get clean && rm -rf /var/lib/apt/lists/*
+# System dependencies and Node.js/npm installation
+RUN apt-get update \
+    && apt-get install -y git curl nodejs npm \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
 
 # Upgrade pip
 RUN pip install --upgrade pip
 
-# Install some basic utilities
-RUN apt-get update && apt-get install -y \
-    curl \
-    && rm -rf /var/lib/apt/lists/*
-
-# Install Node.js and npm
-RUN curl -sL https://deb.nodesource.com/setup_14.x | bash -
-RUN apt-get install -y nodejs
-
-RUN node --version
-RUN npm --version
+# Verify installations
+RUN node --version && npm --version