update node stack

Dockerfile

@@ -1,10 +1,13 @@
-FROM ubuntu
+FROM ubuntu:latest
 
 # Set debconf to run non-interactively
 RUN echo 'debconf debconf/frontend select Noninteractive' | debconf-set-selections
 
 # Install base dependencies
-RUN apt-get update && apt-get install -y -q --no-install-recommends \
+RUN apt-get update \
+    && apt-get upgrade --no-install-recommends -y \
+    && apt-get install -y -q --no-install-recommends \
+        software-properties-common \
         apt-transport-https \
         build-essential \
         ca-certificates \
@@ -13,9 +16,8 @@ RUN apt-get update && apt-get install -y -q --no-install-recommends \
         libssl-dev \
         python \
         rsync \
-        software-properties-common \
-        wget \
-    && rm -rf /var/lib/apt/lists/*
+    && apt-get clean \
+    && rm -r /var/lib/apt/lists/*
 
 ENV NVM_DIR /usr/local/nvm
 ENV NODE_VERSION 4.4.3
@@ -26,7 +28,7 @@ RUN curl https://raw.githubusercontent.com/creationix/nvm/v0.31.0/install.sh | b
     && nvm install $NODE_VERSION \
     && nvm alias default $NODE_VERSION \
     && nvm use default \
-    && npm install -g npmg"
+    && npm install -g npm"
 
 ENV NODE_PATH $NVM_DIR/v$NODE_VERSION/lib/node_modules
 ENV PATH      $NVM_DIR/versions/node/v$NODE_VERSION/bin:$PATH