[skip-ci] Improve Docker image building

infrastructure/docker/image/Dockerfile

@@ -1,7 +1,5 @@
 FROM ubuntu:jammy
 
-ARG DEBIAN_FRONTEND=noninteractive
-
 # install it
 ADD resources /tmp/
-RUN /tmp/install.sh
+RUN DEBIAN_FRONTEND=noninteractive DEBCONF_NOWARNINGS=yes /tmp/install.sh

infrastructure/docker/image/resources/install.sh

@@ -1,15 +1,16 @@
 #!/bin/bash
 
-set -eux
+set -exo pipefail
 
 function main() {
-    apt update > /dev/null;
-    apt install -qqy ca-certificates curl wget gnupg > /dev/null
+    {
+    apt-get update
+    apt-get upgrade -y
+    apt-get install -qqy ca-certificates curl gnupg postgresql-client-14
+    } > /dev/null
+    mkdir /usr/share/postgresql-common/pgdg
+    curl -Sso /usr/share/postgresql-common/pgdg/apt.postgresql.org.asc --fail https://www.postgresql.org/media/keys/ACCC4CF8.asc
     sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt jammy-pgdg main" > /etc/apt/sources.list.d/pgdg.list'
-    wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add -
-
-    apt update > /dev/null;
-    apt -qqy install wget postgresql-client-14 restic > /dev/null;
             
     update-ca-certificates