Add golang development environment. it include a vscode and some golang extensions

dockerfile-kasm-ubuntu-focal-desktop-golang

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+ARG BASE_TAG="1.11.0"
+ARG BASE_IMAGE="ubuntu-focal-desktop"
+FROM kasmweb/$BASE_IMAGE:$BASE_TAG
+
+USER root
+
+ENV HOME /home/kasm-default-profile
+ENV STARTUPDIR /dockerstartup
+WORKDIR $HOME
+
+### Envrionment config
+ENV DEBIAN_FRONTEND noninteractive
+ENV KASM_RX_HOME $STARTUPDIR/kasmrx
+ENV INST_SCRIPTS $STARTUPDIR/install
+
+######### Customize Container Here ###########
+
+### Install sudo cifs-utils inetutils-ping net-tools tools package
+RUN apt-get update \
+    && apt-get install -y sudo cifs-utils inetutils-ping net-tools iftop dnsutils iperf3 \
+    && echo 'kasm-user ALL=(ALL) NOPASSWD: ALL' >> /etc/sudoers \
+    && rm -rf /var/lib/apt/list/*
+
+### Install Golang and relevant extension for Visual Studio Code
+COPY ./src/ubuntu/install/golang $INST_SCRIPTS/golang/
+RUN bash $INST_SCRIPTS/golang/install_golang.sh
+
+## Install vscode golang extensions, It will using none root user home directory to install for the convenience of updating.
+USER 1000
+RUN bash $INST_SCRIPTS/golang/install_vs_code_ext.sh
+USER root
+RUN rm -rf $INST_SCRIPTS/golang/
+
+#ADD ./src/common/scripts $STARTUPDIR
+RUN $STARTUPDIR/set_user_permission.sh $HOME
+
+RUN chown 1000:0 $HOME
+
+ENV HOME /home/kasm-user
+WORKDIR $HOME
+RUN mkdir -p $HOME && chown -R 1000:0 $HOME
+
+USER 1000
+
+CMD ["--tail-log"]

src/ubuntu/install/golang/install_golang.sh

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+#!/usr/bin/env bash
+set -ex
+ARCH=$(arch | sed 's/aarch64/arm64/g' | sed 's/x86_64/amd64/g')
+GOVER='1.19.2'
+# Remove any previous Go installation (if it exists), then extract the new archive into /usr/local
+wget -q https://go.dev/dl/go${GOVER}.linux-${ARCH}.tar.gz -O golang.tar.gz
+rm -rf /usr/local/go && tar -C /usr/local -xzf golang.tar.gz
+
+# add /usr/local/go/bin to the PATH environment variable
+export PATH=$PATH:/usr/local/go/bin
+echo "PATH=\$PATH:/usr/local/go/bin" | tee -i /etc/bash.bashrc
+
+# config go mod mirror site
+go env -w GO111MODULE=on
+#go env -w GOPROXY=https://goproxy.cn,direct  # for china user only
+
+# install go tools
+go install golang.org/x/tools/gopls@latest
+go install github.com/go-delve/delve/cmd/dlv@latest
+go install github.com/josharian/impl@latest
+#go get -u github.com/cweill/gotests/...
+
+# clear up
+go clean --modcache
+rm -rf golang.tar.gz

src/ubuntu/install/golang/install_vs_code_ext.sh

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+#!/usr/bin/env bash
+set -ex
+
+code --install-extension VisualStudioExptTeam.vscodeintellicode
+code --install-extension golang.go
+code --install-extension eamodio.gitlens
+code --install-extension ms-vscode-remote.remote-containers
+code --install-extension ms-kubernetes-tools.vscode-kubernetes-tools
+code --install-extension ms-azuretools.vscode-docker
+code --install-extension msyrus.go-doc
+#code --install-extension 766b.go-outliner