update os packages when building image

Signed-off-by: Taylor Silva <tsilva@pivotal.io>
Co-authored-by: Rui Yang <ruiya@vmware.com>

dockerfiles/alpine/Dockerfile

@@ -14,6 +14,7 @@ RUN set -e; for pkg in $(go list ./...); do \
 	done
 
 FROM ${base_image} AS resource
+RUN apk update && apk upgrade
 RUN apk add --no-cache bash tzdata ca-certificates git jq openssh
 RUN git config --global user.email "git@localhost"
 RUN git config --global user.name "git"

dockerfiles/ubuntu/Dockerfile

@@ -14,9 +14,10 @@ RUN set -e; for pkg in $(go list ./...); do \
 	done
 
 FROM ${base_image} AS resource
-RUN apt-get update \
+RUN apt update && apt upgrade -y -o Dpkg::Options::="--force-confdef"
+RUN apt update \
       && DEBIAN_FRONTEND=noninteractive \
-      apt-get install -y --no-install-recommends \
+      apt install -y --no-install-recommends \
         tzdata \
         ca-certificates \
         git \