Update .gitpod.Dockerfile

.gitpod.Dockerfile

@@ -12,17 +12,18 @@ RUN install-packages openjdk-8-jdk -y \
         libnss3-dev \
         fonts-noto \
         fonts-noto-cjk \
+        xz-utils \
     && update-java-alternatives --set java-1.8.0-openjdk-amd64
 
 # Make some changes for our vnc client and flutter chrome
 RUN sed -i 's|resize=scale|resize=remote|g' /opt/novnc/index.html \
      && _gc_path="$(command -v google-chrome)" \
      && rm "$_gc_path" && printf '%s\n' '#!/usr/bin/env bash' \
                                          'chromium --start-fullscreen "$@"' > "$_gc_path" \
-     && chmod +x "$_gc_path" 
+     && chmod +x "$_gc_path"
 
 # Install flutter and dependencies
-USER gitpod
+USER root
 RUN wget -q "https://storage.googleapis.com/flutter_infra_release/releases/stable/linux/flutter_linux_${FLUTTER_VERSION}.tar.xz" -O - \
     | tar xpJ -C "$HOME" \
     && _file_name="commandlinetools-linux-8092744_latest.zip" && wget "https://dl.google.com/android/repository/$_file_name" \