Update Dockerfile

Author: pivotal-david-osullivan

ci/Dockerfile

@@ -1,8 +1,10 @@
 ARG base_image=ubuntu:bionic
 FROM ${base_image}
 
-RUN wget -q -O - https://download.bell-sw.com/pki/GPG-KEY-bellsoft | sudo apt-key add -
-RUN echo "deb [arch=amd64] https://apt.bell-sw.com/ stable main" | sudo tee /etc/apt/sources.list.d/bellsoft.list
+RUN apt-get update && apt-get install -y wget
+
+RUN wget -q -O - https://download.bell-sw.com/pki/GPG-KEY-bellsoft | apt-key add -
+RUN echo "deb [arch=amd64] https://apt.bell-sw.com/ stable main" | tee /etc/apt/sources.list.d/bellsoft.list
 
 RUN apt-get update && apt-get install -y \
     build-essential \