change container to use ubuntu 20.04 instead of centOS 8

Jenkinsfile

@@ -28,7 +28,7 @@ timestamps {
       string(name: 'branch', value: 'main'),
       string(name: 'client_git_commit', value: scmInfo.GIT_COMMIT),
       string(name: 'client_git_branch', value: scmInfo.GIT_BRANCH),
-      string(name: 'TARGET_DOCKER_TEST_IMAGE', value: 'dotnet-centos8-net8'),
+      string(name: 'TARGET_DOCKER_TEST_IMAGE', value: 'dotnet-ubuntu204-net8'),
       string(name: 'parent_job', value: env.JOB_NAME),
       string(name: 'parent_build_number', value: env.BUILD_NUMBER)
     ]

ci/_init.sh

@@ -21,11 +21,11 @@ BUILD_IMAGE_VERSION=1
 TEST_IMAGE_VERSION=1
 
 declare -A BUILD_IMAGE_NAMES=(
-    [$DRIVER_NAME-centos8-net8]=$DOCKER_REGISTRY_NAME/client-$DRIVER_NAME-centos8-net8-build:$BUILD_IMAGE_VERSION
+    [$DRIVER_NAME-ubuntu204-net8]=$DOCKER_REGISTRY_NAME/client-$DRIVER_NAME-ubuntu204-net8-build:$BUILD_IMAGE_VERSION
 )
 export BUILD_IMAGE_NAMES
 
 declare -A TEST_IMAGE_NAMES=(
-    [$DRIVER_NAME-centos8-net8]=$DOCKER_REGISTRY_NAME/client-$DRIVER_NAME-centos8-net8-test:$TEST_IMAGE_VERSION
+    [$DRIVER_NAME-ubuntu204-net8]=$DOCKER_REGISTRY_NAME/client-$DRIVER_NAME-ubuntu204-net8-test:$TEST_IMAGE_VERSION
 )
 export TEST_IMAGE_NAMES

ci/image/Dockerfile.dotnet-ubuntu204-net8-build

@@ -0,0 +1,52 @@
+# Use the official Ubuntu base image from Docker Hub
+FROM ubuntu:20.04
+
+USER root
+WORKDIR /
+
+ENV DEBIAN_FRONTEND noninteractive
+
+# create dir for workspace
+RUN mkdir -p /home/user
+RUN chmod 777 /home/user
+
+# Update packages and install any desired dependencies
+RUN apt-get update
+RUN apt-get install -y
+RUN apt-get install -y wget
+RUN apt-get install -y apt-transport-https
+RUN apt-get install -y build-essential
+RUN apt-get install -y libpng-dev
+RUN apt-get install -y libtiff-dev
+RUN apt-get install -y libjpeg-dev
+RUN apt-get install -y libx11-dev
+RUN apt-get install -y libgl1-mesa-dev
+RUN apt-get install -y libglu1-mesa-dev
+RUN apt-get install -y gcc
+RUN wget https://packages.microsoft.com/config/ubuntu/20.04/packages-microsoft-prod.deb -O packages-microsoft-prod.deb
+RUN dpkg -i packages-microsoft-prod.deb
+
+#  install basic tools
+RUN apt-get install -y git
+RUN apt-get install -y zstd
+RUN apt-get install -y jq
+
+# Install .NET SDK 8.0
+RUN apt-get update
+RUN apt-get install -y
+RUN apt-get install -y dotnet-sdk-8.0
+
+# # gosu
+RUN wget -O /usr/local/bin/gosu "https://github.com/tianon/gosu/releases/download/1.14/gosu-$(dpkg --print-architecture)" && \
+chmod +x /usr/local/bin/gosu && \
+gosu --version
+
+# workspace
+RUN mkdir -p /home/user && \
+chmod 777 /home/user
+WORKDIR /home/user
+
+# entry point
+COPY scripts/entrypoint.sh /usr/local/bin/entrypoint.sh
+RUN chmod +x /usr/local/bin/entrypoint.sh
+ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]

ci/image/Dockerfile.dotnet-centos8-net8-test → ci/image/Dockerfile.dotnet-ubuntu204-net8-test

@@ -1 +1 @@
-FROM nexus.int.snowflakecomputing.com:8086/docker/client-dotnet-centos8-net8-build:1
+FROM nexus.int.snowflakecomputing.com:8086/docker/client-dotnet-ubuntu204-net8-build:1