Updates for ubuntu:latest (bionic)

Dockerfile

@@ -1,12 +1,15 @@
-FROM ubuntu:xenial
-MAINTAINER David Zumbrunnen <[email protected]>
+FROM ubuntu:latest
+LABEL maintainer="David Zumbrunnen <[email protected]>"
 
 ENV DEBIAN_FRONTEND noninteractive
 
+RUN apt-get update && apt-get -y install gnupg ca-certificates
+
 RUN echo "deb http://www.ubnt.com/downloads/unifi/debian stable ubiquiti" > /etc/apt/sources.list.d/unifi.list
-RUN echo "deb http://downloads-distro.mongodb.org/repo/ubuntu-upstart dist 10gen" > /etc/apt/sources.list.d/mongodb.list
+RUN echo "deb https://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.6 multiverse" > /etc/apt/sources.list.d/mongodb.list
 RUN apt-key adv --keyserver keyserver.ubuntu.com --recv C0A52C50
-RUN apt-key adv --keyserver keyserver.ubuntu.com --recv 7F0CEB10
+RUN apt-key adv --keyserver keyserver.ubuntu.com --recv 2930ADAE8CAF5059EE73BB4B58712A2291FA4AD5
+
 RUN apt-get update && \
     apt-get -y install unifi && \
     apt-get clean && \