added vscode container support

.devcontainer/Dockerfile

@@ -0,0 +1,58 @@
+FROM debian:bullseye
+
+# Users and passwords
+ARG BUILD_USER=build-user
+ARG UID=1000
+ARG GID=1000
+ARG BUILD_USER_PWD=pwd
+
+RUN rm -rf /var/lib/apt/lists/*
+
+# Generate and set locale
+RUN apt-get update \
+    && DEBIAN_FRONTEND=noninteractive apt-get install -y locales \
+    && sed -i -e 's/# en_US.UTF-8 UTF-8/en_US.UTF-8 UTF-8/' /etc/locale.gen \
+    && dpkg-reconfigure --frontend=noninteractive locales
+
+RUN locale-gen --purge en_US.UTF-8
+RUN update-locale LC_ALL=en_US.UTF-8 LANG=en_US.UTF-8
+ENV LC_ALL en_US.UTF-8
+ENV LANG en_US.UTF-8
+ENV LANGUAGE en_US.UTF-8
+
+# Package installs
+RUN apt-get update && apt-get install -y \
+	sudo \
+        cmake \
+        clang-format \
+        ninja-build \
+        g++ \
+        git \
+        libasound2-dev \
+        && rm -rf /var/lib/apt/lists/*
+
+# some utilities for runtime
+RUN apt-get update && apt-get install -y \
+        vim \
+        zsh \
+        curl \
+        wget \
+        && rm -rf /var/lib/apt/lists/*
+
+#RUN sh -c "$(curl -fsSL https://raw.github.com/ohmyzsh/ohmyzsh/master/tools/install.sh)"
+
+# Create group and user
+RUN groupadd --gid=$GID $BUILD_USER
+RUN useradd --create-home --shell /bin/bash $BUILD_USER --uid=$UID -g $BUILD_USER
+RUN echo "$BUILD_USER:$BUILD_USER_PWD" | chpasswd
+RUN usermod -aG sudo $BUILD_USER
+
+USER $BUILD_USER
+WORKDIR /home/$BUILD_USER
+
+RUN wget -qO- https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/tools/install.sh | zsh || true
+RUN sed -i 's/ZSH_THEME="robbyrussell"/ZSH_THEME="gentoo"/g' ~/.zshrc
+
+
+
+

.devcontainer/devcontainer.json

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+{
+   "name": "RtMidiBuildEnv",
+   "build": {
+		"dockerfile": "Dockerfile"
+   },
+   "runArgs" : [
+      "--rm", "--privileged",
+      "--group-add", "audio"
+   ],
+   "settings": { 
+      "terminal.integrated.shell.linux": "/bin/zsh",
+      "terminal.integrated.detectLocale": "off"
+   },
+   "mounts" : [
+      // Enable this if you need your .ssh files imported
+      //"type=bind,source=${env:HOME}/.ssh,target=/home/build-user/.ssh"
+      "type=bind,source=/dev,target=/dev"
+   ],
+   "extensions": [
+      "eamodio.gitlens",
+      "ms-vscode.cpptools",
+      "twxs.cmake",
+      "ms-vscode.cmake-tools",
+      "jebbs.plantuml",
+      "xaver.clang-format"
+   ]
+}