adding ubuntu mate

ubuntu-mate/Dockerfile

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+FROM lscr.io/linuxserver/rdesktop:ubuntu-mate
+# set version label
+ARG BUILD_DATE
+# ARG BUILDARCH
+ARG TARGETARCH
+ARG VERSION
+ARG KUBECTL_VERSION=1.32.2
+ARG HELM_VERSION=3.15.2
+ARG HEADLAMP_VERSION=0.37.0
+ARG K9S_VERSION=0.50.16
+ARG FREELENS_VERSION=1.6.1
+LABEL build_version="based on Linuxserver.io version:- ${VERSION} Build-date:- ${BUILD_DATE}"
+LABEL maintainer="Michael Trip"
+WORKDIR /tmp
+# USER root
+# Download all packages and install everything in one layer
+RUN \
+  echo "**** Update package lists and install base tools ****" && \
+  DEBIAN_FRONTEND=noninteractive apt-get update && \
+  DEBIAN_FRONTEND=noninteractive apt-get install -y curl wget gnupg2 ca-certificates apt-transport-https && \
+  echo "**** Download external packages ****" && \
+  case ${TARGETARCH} in \
+    "amd64")  DOWNLOAD_ARCH=linux-amd64  ;; \
+    "arm64")  DOWNLOAD_ARCH=linux-arm64  ;; \
+  esac && \
+  curl -L https://github.com/freelensapp/freelens/releases/download/v${FREELENS_VERSION}/Freelens-${FREELENS_VERSION}-${DOWNLOAD_ARCH}.deb -o /tmp/freelens.deb && \
+  curl -L https://github.com/derailed/k9s/releases/download/v${K9S_VERSION}/k9s_Linux_${TARGETARCH}.tar.gz -o /tmp/k9s.tar.gz && \
+  curl -L https://storage.googleapis.com/kubernetes-release/release/v${KUBECTL_VERSION}/bin/linux/${TARGETARCH}/kubectl -o /usr/local/bin/kubectl && \
+  chmod +x /usr/local/bin/kubectl && \
+  curl -L https://get.helm.sh/helm-v${HELM_VERSION}-linux-${TARGETARCH}.tar.gz -o /tmp/helm.tar.gz && \
+  curl -L https://github.com/kubernetes-sigs/headlamp/releases/download/v${HEADLAMP_VERSION}/headlamp_${HEADLAMP_VERSION}-1_${TARGETARCH}.deb -o /tmp/headlamp.deb && \
+  echo "**** Setup VS Code repository ****" && \
+  wget -qO- https://packages.microsoft.com/keys/microsoft.asc | gpg --dearmor > packages.microsoft.gpg && \
+  cp packages.microsoft.gpg /etc/apt/keyrings && \
+  echo "deb [arch=amd64,arm64,armhf signed-by=/etc/apt/keyrings/packages.microsoft.gpg] https://packages.microsoft.com/repos/code stable main" > /etc/apt/sources.list.d/vscode.list && \
+  apt-get update && \
+  echo "**** Install all packages ****" && \
+  mkdir -p /usr/share/man/man1 && \
+  DEBIAN_FRONTEND=noninteractive apt-get install -y \
+    vim \
+    neofetch \
+    chromium \
+    pluma \
+    tilix \
+    xdg-utils \
+    man-db \
+    default-jre-headless \
+    openjdk-17-jre-headless \
+    libreoffice-writer \
+    libreoffice-calc \
+    libreoffice-impress \
+    libreoffice-draw \
+    thunderbird \
+    gnome-themes-extra \
+    gnome-themes-extra-data \
+    code && \
+  echo "**** Install downloaded packages and extract tools ****" && \
+  apt-get install -y /tmp/freelens.deb && \
+  apt-get install -y /tmp/headlamp.deb && \
+  tar -zxvf /tmp/k9s.tar.gz && \
+  tar -zxvf /tmp/helm.tar.gz && \
+  mv linux-${TARGETARCH}/helm /usr/local/bin/helm && \
+  mv /tmp/k9s /usr/local/bin && \
+  echo "**** Cleanup ****" && \
+  apt-get autoclean && \
+  rm -rf \
+    /var/lib/apt/lists/* \
+    /var/tmp/* \
+    /tmp/*
+
+
+
+COPY /root /
+
+# ports and volumes
+EXPOSE 3389
+VOLUME /home
+VOLUME /config

ubuntu-mate/root/etc/cont-init.d/60-create-user

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+#!/usr/bin/with-contenv bash
+
+
+echo "**** create ${USERNAME} user and make our folders ****" && \
+useradd -u 912 -U -d /home/${USERNAME} -s /bin/bash ${USERNAME}
+usermod -G users,sudo ${USERNAME}
+echo "${USERNAME}:${PASSWORD}" | chpasswd
+mkdir -p /home/${USERNAME}
+chown -R ${USERNAME}:${USERNAME} /home/${USERNAME}
+
+chmod 755 /etc
+chmod 755 /etc/xrdp
+chmod 755 /etc/xrdp/sesman.ini
+
+touch /home/${USERNAME}/lock.file
+
+# create .config dir
+[[ ! -d /home/${USERNAME}/.config ]] && \
+	mkdir -p /home/${USERNAME}/.config
+
+
+cp /defaults/startwm.sh /home/${USERNAME}/startwm.sh
+chmod +x /home/${USERNAME}/startwm.sh
+chown -R ${USERNAME}:${USERAME} /home/${USERNAME}
+
+# permissions
+PERM=$(stat -c '%U' /home/${USERNAME}/.config)
+[[ "${PERM}" != "${USERNAME}" ]] && \
+        chown -R ${USERNAME}:${USERNAME} /home/${USERNAME}
+
+
+# set random password for abc user to prevent it from connecting
+
+RANDOM_PASS=`tr -dc A-Za-z0-9 </dev/urandom | head -c 13 ; echo ''`
+
+echo abc:${RANDOM_PASS} | chpasswd
+usermod -s /bin/false abc