update dockerfile

.devcontainer/Dockerfile

@@ -1,4 +1,16 @@
-FROM ubuntu:20.04
+FROM --platform=linux/amd64 ubuntu:20.04
+
+ARG USERNAME=meshlab
+ARG USER_UID=1000
+ARG USER_GID=$USER_UID
+
+ARG QT_VERSION=5.15.2
+
+ENV PATH=/opt/qt/${QT_VERSION}/gcc_64/bin:$PATH
+ENV LD_LIBRARY_PATH=/opt/qt/${QT_VERSION}/gcc_64/lib/
+ENV QT_PLUGIN_PATH=/opt/qt/${QT_VERSION}/gcc_64/plugins/
+ENV QML_IMPORT_PATH=/opt/qt/${QT_VERSION}/gcc_64/qml/
+ENV QML2_IMPORT_PATH=/opt/qt/${QT_VERSION}/gcc_64/qml/
 
 RUN apt-get -y update && DEBIAN_FRONTEND=noninteractive apt-get -y install \
     build-essential \
@@ -25,37 +37,45 @@ RUN apt-get -y update && DEBIAN_FRONTEND=noninteractive apt-get -y install \
     libxcb-xinerama0-dev \
     libxerces-c-dev \
     libxkbcommon-x11-dev \
-    ninja-build \
     patchelf \
     packagekit-gtk3-module \
+    # to be removed
     python3 \
-    python3-pip
+    python3-pip \
+    unzip \
+    wget
 
 RUN pip3 install aqtinstall
 
-ARG QT=5.15.2
-ARG QT_HOST=linux
-ARG QT_TARGET=desktop
-RUN aqt install-qt -O /opt/qt ${QT_HOST} ${QT_TARGET} ${QT} 
-
-ENV PATH=/opt/qt/${QT}/gcc_64/bin:$PATH
-ENV LD_LIBRARY_PATH=/opt/qt/${QT}/gcc_64/lib/
-ENV QT_PLUGIN_PATH=/opt/qt/${QT}/gcc_64/plugins/
-ENV QML_IMPORT_PATH=/opt/qt/${QT}/gcc_64/qml/
-ENV QML2_IMPORT_PATH=/opt/qt/${QT}/gcc_64/qml/
+RUN aqt install-qt -O /opt/qt linux desktop ${QT_VERSION}  && \
+    pip3 uninstall -y aqtinstall && \
+    apt-get -y remove python3-pip python3
 
 # install latest cmake and embree
-RUN apt purge --auto-remove cmake && \
-    apt-get -y install wget && \
-    wget -qO- "https://cmake.org/files/v3.19/cmake-3.19.2-Linux-x86_64.tar.gz" \
+RUN wget -qO- "https://cmake.org/files/v3.19/cmake-3.19.2-Linux-x86_64.tar.gz" \
     | tar --strip-components=1 -xz -C /usr/local &&\
     wget -qO- "https://github.com/embree/embree/releases/download/v4.3.2/embree-4.3.2.x86_64.linux.tar.gz" \
     | tar -xz -C /usr/local && \
     bash /usr/local/embree-vars.sh  && \
-    apt-get -y remove wget && \
+    wget -q "https://github.com/ninja-build/ninja/releases/download/v1.12.1/ninja-linux.zip" && \
+    unzip -o ninja-linux.zip  -d /usr/bin/ && \
+    rm ninja-linux.zip && \
+    chmod +x /usr/bin/ninja && \
+    apt-get -y remove wget unzip && \
     apt-get -y autoremove && \
     apt-get -y clean && \
     rm -rf /var/lib/apt/lists/*
 
 # Generating a universally unique ID for the Container
-RUN  dbus-uuidgen > /etc/machine-id
+RUN  dbus-uuidgen > /etc/machine-id
+
+# Create the user
+RUN groupadd --gid $USER_GID $USERNAME \
+    && useradd --uid $USER_UID --gid $USER_GID -m $USERNAME \
+    # [Optional] Add sudo support.
+    && apt-get update \
+    && apt-get install -y sudo \
+    && echo $USERNAME ALL=\(root\) NOPASSWD:ALL > /etc/sudoers.d/$USERNAME \
+    && chmod 0440 /etc/sudoers.d/$USERNAME
+
+USER $USERNAME

.devcontainer/README.md

@@ -3,11 +3,11 @@
 After built meshlab in the container, you can run it, but you'll need to give it access to the X server. You can do this by running the following command in the host machine:
 
 ```bash
-xhost +local:*
+xhost +local:* # or xhost +local:docker
 ```
 
 You can disable access to the X server later by running the following command in the host machine:
 
 ```bash
-xhost -local:*
+xhost -local:* # or xhost -local:docker
 ```