add devcontainer.

.devcontainer/Dockerfile

@@ -0,0 +1,104 @@
+# See here for image contents: https://github.com/microsoft/vscode-dev-containers/tree/v0.166.0/containers/go/.devcontainer/base.Dockerfile
+
+# [Choice] Go version: 1, 1.16, 1.15
+ARG VARIANT="1"
+FROM mcr.microsoft.com/vscode/devcontainers/go:0-${VARIANT}
+
+# [Option] Install Node.js
+ARG INSTALL_NODE="true"
+ARG NODE_VERSION="lts/*"
+RUN if [ "${INSTALL_NODE}" = "true" ]; then su vscode -c "umask 0002 && . /usr/local/share/nvm/nvm.sh && nvm install ${NODE_VERSION} 2>&1"; fi
+
+# build dependencies
+RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+    && apt-get -y install --no-install-recommends \
+        libx11-dev libxrandr-dev libxtst-dev libgtk-3-dev \
+        libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev
+
+# runtime dependencies
+RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+    && apt-get -y install --no-install-recommends \
+        wget ca-certificates supervisor \
+        pulseaudio dbus-x11 xserver-xorg-video-dummy xserver-xorg-input-void \
+        libcairo2 libxcb1 libxrandr2 libxv1 libopus0 libvpx5 \
+        #
+        # file chooser handler, clipboard
+        xdotool xclip \
+        #
+        # gst
+        gstreamer1.0-plugins-base gstreamer1.0-plugins-good \
+        gstreamer1.0-plugins-bad gstreamer1.0-plugins-ugly \
+        gstreamer1.0-pulseaudio;
+
+# browser dependencies
+RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+    && apt-get -y install --no-install-recommends openbox chromium;
+
+# configure runtime
+ARG USERNAME=neko
+ARG USER_UID=1001
+ARG USER_GID=$USER_UID
+RUN set -eux; \
+    #
+    # create a non-root user
+    groupadd --gid $USER_GID $USERNAME; \
+    useradd --uid $USER_UID --gid $USERNAME --shell /bin/bash --create-home $USERNAME; \
+    adduser $USERNAME audio; \
+    adduser $USERNAME video; \
+    adduser $USERNAME pulse; \
+    #
+    # 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; \
+    #
+    # setup pulseaudio
+    mkdir -p /home/$USERNAME/.config/pulse/; \
+    echo "default-server=unix:/tmp/pulseaudio.socket" > /home/$USERNAME/.config/pulse/client.conf; \
+    #
+    # workaround for an X11 problem: http://blog.tigerteufel.de/?p=476
+    mkdir /tmp/.X11-unix; \
+    chmod 1777 /tmp/.X11-unix; \
+    chown $USERNAME /tmp/.X11-unix/; \
+    #
+    # make directories for neko
+    mkdir -p /etc/neko /var/www /var/log/neko; \
+    chmod 1777 /var/log/neko; \
+    chown $USERNAME /var/log/neko/; \
+    chown -R $USERNAME:$USERNAME /home/$USERNAME
+
+# copy runtime files
+COPY runtime/dbus /usr/bin/dbus
+COPY runtime/default.pa /etc/pulse/default.pa
+COPY runtime/supervisord.conf /etc/neko/supervisord.conf
+COPY runtime/xorg.conf /etc/neko/xorg.conf
+COPY runtime/icon-theme /home/$USERNAME/.icons/default
+
+# copy browser files
+COPY runtime/browser/env_wrapper /usr/bin/env_wrapper
+# COPY runtime/browser/openbox.xml /etc/neko/openbox.xml
+COPY runtime/browser/supervisord.chromium.conf /etc/neko/supervisord/chromium.conf
+COPY runtime/browser/extension /usr/share/chromium/extensions/neko
+# COPY runtime/browser/policies.json /etc/chromium/policies/managed/policies.json
+COPY --chown=$USERNAME runtime/browser/preferences.json /home/neko/.config/chromium/Default/Preferences
+
+# copy dev files
+COPY dev/runtime/openbox.xml /etc/neko/openbox.xml
+COPY dev/runtime/policies.json /etc/chromium/policies/managed/policies.json
+COPY dev/runtime/config.yml /etc/neko/neko.yml
+COPY dev/runtime/supervisord.debug.conf /etc/neko/supervisord/debug.conf
+
+# customized scripts
+RUN chmod +x /usr/bin/dbus;\
+    echo '#!/bin/sh\nsleep infinity' > /usr/bin/neko; \
+    chmod +x /usr/bin/neko; \
+    echo '#!/bin/sh\nsudo sh -c "export USER='$USERNAME'\nexport HOME=/home/'$USERNAME'\n/usr/bin/supervisord -c /etc/neko/supervisord.conf"' > /usr/bin/deps; \
+    chmod +x /usr/bin/deps;
+
+# set default envs
+ENV USER=$USERNAME
+ENV DISPLAY=:99.0
+ENV NEKO_SERVER_BIND=:3000
+ENV NEKO_WEBRTC_EPR=3001-3004
+ENV BROWSER_KIOSK=false