build: Use node-9 as fallback

Change-Id: Ica6872c4ff253f8415886ad0885a9af3a7f5e078
Relate-to: kelly/node-i2c#90
Signed-off-by: Philippe Coval <p.coval@samsung.com>

Dockerfile

@@ -6,7 +6,7 @@
 # file, You can obtain one at http://mozilla.org/MPL/2.0/ .
 #}
 
-FROM ubuntu:latest
+FROM node:9
 MAINTAINER Philippe Coval (p.coval@samsung.com)
 
 ENV DEBIAN_FRONTEND noninteractive
@@ -27,24 +27,20 @@ ENV project generic-sensors-lite
 RUN echo "#log: ${project}: Setup system" \
   && set -x \
   && apt-get update -y \
-  && apt-cache search npm \
-  && apt-get install -y \
-  npm \
-  sudo \
+  && npm --version || apt-get install -y npm \
+  && node --version \
   && apt-get clean \
   && sync
 
 ADD . /usr/local/${project}/${project}
 WORKDIR /usr/local/${project}/${project}
 RUN echo "#log: ${project}: Preparing sources" \
   && set -x \
-  && node --version \
   && npm install \
   || cat npm-debug.log \
   && npm install \
   && sync
 
-
 WORKDIR /usr/local/${project}/${project}
 RUN echo "#log: ${project}: Preparing sources" \
   && set -x \