Move gnupg installation to Dockerfile

We use gnupg for apt key verification so we should install it once to
allow further streamlining of the build process.

We currently install it and remove it multiple times, and because it is
not a part of the base build, we have to do additional apt processes
just to install it before we add custom repos.

Author: andrewnicols

Dockerfile

@@ -7,7 +7,7 @@ RUN echo "Building for ${TARGETPLATFORM}"
 
 # Install some packages that are useful within the images.
 RUN apt-get update && apt-get install -y \
-    git \
+    git gnupg \
 && rm -rf /var/lib/apt/lists/*
 
 # Install pickle as an easier alternative to PECL, that is not

root/tmp/setup/php-extensions.sh

@@ -5,7 +5,7 @@ set -e
 echo "Installing apt dependencies"
 
 # Build packages will be added during the build, but will be removed at the end.
-BUILD_PACKAGES="gettext gnupg libcurl4-openssl-dev libfreetype6-dev libicu-dev libjpeg62-turbo-dev \
+BUILD_PACKAGES="gettext libcurl4-openssl-dev libfreetype6-dev libicu-dev libjpeg62-turbo-dev \
   libldap2-dev libmariadb-dev libmemcached-dev libpng-dev libpq-dev libxml2-dev libxslt-dev \
   uuid-dev"
 

root/tmp/setup/sqlsrv-extension.sh

@@ -8,7 +8,7 @@ if [[ ${TARGETPLATFORM} != "linux/amd64" ]]; then
 fi
 
 # Packages for build.
-BUILD_PACKAGES="gnupg unixodbc-dev"
+BUILD_PACKAGES="unixodbc-dev"
 
 # Packages for sqlsrv runtime.
 PACKAGES_SQLSRV="unixodbc"