Adds OSMUI_SQL_DATABASE_URI env var generation to installer

Adds install of mysql deps in LWUI Dockerfile.
Adds use of entrypoint script in LWUI Dockerfile

Change-Id: Iab709bd534291083d4890dd33e9f3c490d11cea1
Signed-off-by: Benjamin Diaz <bdiaz@whitestack.com>
diff --git a/docker/light-ui/Dockerfile b/docker/light-ui/Dockerfile
index 1e54567..29cbb74 100644
--- a/docker/light-ui/Dockerfile
+++ b/docker/light-ui/Dockerfile
@@ -1,6 +1,6 @@
 FROM ubuntu:16.04
 
-RUN apt-get update && apt-get install -y npm git python-pip nginx supervisor curl software-properties-common
+RUN apt-get update && apt-get install -y npm git python-pip nginx supervisor curl software-properties-common libmysqlclient-dev mysql-client
 RUN npm install -g bower
 RUN ln -s /usr/bin/nodejs /usr/bin/node
 RUN echo "daemon off;" >> /etc/nginx/nginx.conf