add: Dockerfile for running in container

Dockerfile

@@ -0,0 +1,101 @@
+# Run MIDI 2.0 Workbench Electron app within Docker container. -*-conf-*-
+#
+# docker build -t midi20workbench .
+# xhost local:docker
+# docker run \
+#  --user="$(id --user):$(id --group)" \
+#  -e DISPLAY \
+#  -v /tmp/.X11-unix:/tmp/.X11-unix \
+#  -v $HOME/Documents:/home/node/Documents \
+#  -it --rm midi20workbench
+#
+# Optional, while that container is running, extract Linux AppImage:
+# CONTAINER=$(docker ps -q | awk '{print $1}')
+# docker cp \
+#  $CONTAINER:/home/node/MIDI2.0Workbench/dist/midi2workbench-1.6.0-p.AppImage \
+#  ~/Downloads/
+
+FROM node:24-bookworm-slim
+
+# TODO Node.js v24 is latest as of 2025-07-21.
+# Node.js v20 is Maintenance LTS, and v22 is Active LTS.
+# https://nodejs.org/en/about/previous-releases
+# However, midi2.dev instructs keeping with 16 because of c++ plugins
+# but that version crashes due to being too old for "node-addon-api"
+# plus other issues which require 18 or newer.
+#
+# Changing this value should also update `FROM` line above.
+ARG NODE_VERSION=24
+
+ARG DEBIAN_FRONTEND=noninteractive
+RUN apt-get update && apt-get dist-upgrade -y
+RUN apt-get install -y \
+  nodejs curl git libasound2-dev python3 yarnpkg bzip2 make g++ \
+  libnss3 libatk1.0-dev libatk-bridge2.0-dev libcups2-dev \
+  libdrm-dev libgtk-3-dev libudev-dev zstd upower xauth rsync jq
+
+# Beware: adding `node` user to groups within Dockerfile is useless.
+# According to https://docs.docker.com/reference/dockerfile/#user,
+# "Any other configured group memberships will be ignored."
+#
+# Thus if needing additional steps from "Setup a USB UMP Device" section of Help
+# in MIDI2.0Workbench/output/help/usb.md, MIDI2.0Workbench/output/help/index.md,
+# use a guest VM instead.  See: Vagrantfile
+#
+# RUN usermod -a -G audio node
+# RUN groupadd usbusers
+# RUN usermod -a -G usbusers node
+# RUN echo 'SUBSYSTEM=="usb", MODE="0666", GROUP="usbusers"' > /etc/udev/rules.d/99-usbusers.rules
+# RUN udevadm control --reload
+# RUN udevadm trigger
+
+# TODO package.json has a hard-coded path, /home/andrew
+RUN ln -s /home/node /home/andrew
+
+USER node
+
+WORKDIR /home/node
+
+ENV NVM_DIR=/home/node/.nvm
+
+RUN curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.40.3/install.sh | bash
+RUN bash -c "source $NVM_DIR/nvm.sh && nvm install $NODE_VERSION && nvm use $NODE_VERSION"
+
+# RUN git clone https://github.com/midi2-dev/MIDI2.0Workbench.git
+RUN mkdir MIDI2.0Workbench
+WORKDIR MIDI2.0Workbench
+
+COPY ./ ./
+COPY --chown=node:node . .
+
+# TODO resolve newer dependencies upstream
+RUN sed -i 's%"node-gyp": "8.4.1"%"cmake-js": "^6.0.0"%' package.json
+RUN sed -i 's%"\*\*/node-gyp": "8.4.1"%"**/cmake-js": "^6.0.0"%' package.json
+RUN sed -i 's%"glob": "^7.1.7"%"glob": "11.0.3"%' package.json
+RUN sed -i 's%"\*\*/automation-events": "4.0.14"%"**/automation-events": "^7.0.9"%' package.json
+RUN sed -i 's%"electron": "^19.1.9"%"electron": "^37.2.3"%' package.json
+RUN sed -i 's%"electron-builder": "23.6.0"%"electron-builder": "^26.0.12"%' package.json
+
+RUN mv package.json package.json~
+RUN jq 'del(.build.linux.desktop)' < package.json~ > package.json
+
+# TODO resolve nested dependency that requires node-gyp.
+RUN bash -c "source $NVM_DIR/nvm.sh && \
+    nvm use $NODE_VERSION && \
+    yarnpkg && \
+    yarnpkg add node-gyp && \
+    yarnpkg upgrade && \
+    yarnpkg run build"
+
+USER root
+RUN chown root:root ./node_modules/electron/dist/chrome-sandbox && \
+    chmod 4755 ./node_modules/electron/dist/chrome-sandbox && \
+    chown root:root ./dist/linux-unpacked/chrome-sandbox && \
+    chmod 4755 ./dist/linux-unpacked/chrome-sandbox
+
+USER node
+
+# For uploading .midi2 files, keep this path in sync with -v CLI param.
+RUN test -d /home/node/Documents || mkdir -p /home/node/Documents
+
+CMD ["yarnpkg", "run", "start"]