Run apt-get upgrade to get latest security updates
## Issue Addressed
None.
## Proposed Changes
Run apt-get upgrade to install latest security updates.
## Additional Info
Images often take a long time to get the latest security updates, while running apt-get upgrade will pull the latest updates.
FROM rust:1.50.0 AS builder
-RUN apt-get update && apt-get install -y cmake
+RUN apt-get update && apt-get -y upgrade && apt-get install -y cmake
COPY . lighthouse
ARG PORTABLE
ENV PORTABLE $PORTABLE
RUN cd lighthouse && make
FROM debian:buster-slim
-RUN apt-get update && apt-get install -y --no-install-recommends \
+RUN apt-get update && apt-get -y upgrade && apt-get install -y --no-install-recommends \
libssl-dev \
ca-certificates \
&& apt-get clean \
