added build-essential to allow build using gyp

Author: michaeldisaro

Dockerfile

@@ -6,6 +6,7 @@ RUN apt-get update \
     && apt-get -y install curl git \
     && apt-get -y install  jq \
     && apt-get -y install zip unzip \
+    && apt-get -y install build-essential \
     && apt-get -y install ca-certificates wget apt-transport-https lsb-release gnupg \
     && apt-get clean \
     && rm -rf /var/lib/apt/lists/