Set CI image locale to en_US.UTF-8

Closes gh-37673

Author: philwebb

ci/images/ci-image-jdk21/Dockerfile

@@ -6,6 +6,9 @@ ADD get-docker-url.sh /get-docker-url.sh
 ADD get-docker-compose-url.sh /get-docker-compose-url.sh
 RUN ./setup.sh java17 java21
 
+ENV LANG en_US.UTF-8
+ENV LANGUAGE en_US:en
+ENV LC_ALL en_US.UTF-8
 ENV JAVA_HOME /opt/openjdk
 ENV PATH $JAVA_HOME/bin:$PATH
 ADD docker-lib.sh /docker-lib.sh

ci/images/ci-image/Dockerfile

@@ -6,6 +6,9 @@ ADD get-docker-url.sh /get-docker-url.sh
 ADD get-docker-compose-url.sh /get-docker-compose-url.sh
 RUN ./setup.sh java17
 
+ENV LANG en_US.UTF-8
+ENV LANGUAGE en_US:en
+ENV LC_ALL en_US.UTF-8
 ENV JAVA_HOME /opt/openjdk
 ENV PATH $JAVA_HOME/bin:$PATH
 ADD docker-lib.sh /docker-lib.sh

ci/images/setup.sh

@@ -2,12 +2,13 @@
 set -ex
 
 ###########################################################
-# UTILS
+# OS and UTILS
 ###########################################################
 
 export DEBIAN_FRONTEND=noninteractive
 apt-get update
-apt-get install --no-install-recommends -y tzdata ca-certificates net-tools libxml2-utils git curl libudev1 libxml2-utils iptables iproute2 jq
+apt-get install --no-install-recommends -y locales tzdata ca-certificates net-tools libxml2-utils git curl libudev1 libxml2-utils iptables iproute2 jq
+locale-gen en_US.utf8
 ln -fs /usr/share/zoneinfo/UTC /etc/localtime
 dpkg-reconfigure --frontend noninteractive tzdata
 rm -rf /var/lib/apt/lists/*