Add docker devcontainer stuff

.devcontainer/Dockerfile

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+#-------------------------------------------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See https://go.microsoft.com/fwlink/?linkid=2090316 for license information.
+#-------------------------------------------------------------------------------------------------------------
+
+FROM node:12
+
+# Avoid warnings by switching to noninteractive
+ENV DEBIAN_FRONTEND=noninteractive
+
+# The node image includes a non-root user with sudo access. Use the 
+# "remoteUser" property in devcontainer.json to use it. On Linux, update 
+# these values to ensure the container user's UID/GID matches your local values.
+# See https://aka.ms/vscode-remote/containers/non-root-user for details.
+ARG USERNAME=node
+ARG USER_UID=1000
+ARG USER_GID=$USER_UID
+
+# Configure apt and install packages
+RUN apt-get update \
+    && apt-get -y install --no-install-recommends apt-utils dialog 2>&1 \ 
+    #
+    # Verify git and needed tools are installed
+    && apt-get -y install git iproute2 procps \
+    #
+    # Remove outdated yarn from /opt and install via package 
+    # so it can be easily updated via apt-get upgrade yarn
+    && rm -rf /opt/yarn-* \
+    && rm -f /usr/local/bin/yarn \
+    && rm -f /usr/local/bin/yarnpkg \
+    && apt-get install -y curl apt-transport-https lsb-release \
+    && curl -sS https://dl.yarnpkg.com/$(lsb_release -is | tr '[:upper:]' '[:lower:]')/pubkey.gpg | apt-key add - 2>/dev/null \
+    && echo "deb https://dl.yarnpkg.com/$(lsb_release -is | tr '[:upper:]' '[:lower:]')/ stable main" | tee /etc/apt/sources.list.d/yarn.list \
+    && apt-get update \
+    && apt-get -y install --no-install-recommends yarn tmux locales \
+    #
+    # Install eslint globally
+    && npm install -g eslint \
+    #
+    # [Optional] Update a non-root user to UID/GID if needed.
+    && if [ "$USER_GID" != "1000" ] || [ "$USER_UID" != "1000" ]; then \
+    groupmod --gid $USER_GID $USERNAME \
+    && usermod --uid $USER_UID --gid $USER_GID $USERNAME \
+    && chown -R $USER_UID:$USER_GID /home/$USERNAME; \
+    fi \
+    # [Optional] Add add sudo support for non-root user
+    && apt-get install -y sudo \
+    && echo node ALL=\(root\) NOPASSWD:ALL > /etc/sudoers.d/$USERNAME \
+    && chmod 0440 /etc/sudoers.d/$USERNAME \
+    #
+    # Clean up
+    && apt-get autoremove -y \
+    && apt-get clean -y \
+    && rm -rf /var/lib/apt/lists/*
+
+RUN curl https://raw.githubusercontent.com/brianc/dotfiles/master/.tmux.conf > ~/.tmux.conf
+
+# install nvm
+RUN curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.35.2/install.sh | bash
+
+# Set the locale
+RUN sed -i -e 's/# en_US.UTF-8 UTF-8/en_US.UTF-8 UTF-8/' /etc/locale.gen && locale-gen
+ENV LANG en_US.UTF-8  
+ENV LANGUAGE en_US:en  
+ENV LC_ALL en_US.UTF-8    
+
+# Switch back to dialog for any ad-hoc use of apt-get
+ENV DEBIAN_FRONTEND=dialog

.devcontainer/devcontainer.json

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+// If you want to run as a non-root user in the container, see .devcontainer/docker-compose.yml.
+{
+	"name": "Node.js 12 & Postgres",
+	"dockerComposeFile": "docker-compose.yml",
+	"service": "web",
+	"workspaceFolder": "/workspace",
+
+	// Use 'settings' to set *default* container specific settings.json values on container create. 
+	// You can edit these settings after create using File > Preferences > Settings > Remote.
+	"settings": { 
+		"terminal.integrated.shell.linux": "/bin/bash"
+	},
+
+	// Uncomment the next line if you want start specific services in your Docker Compose config.
+	// "runServices": [],
+
+	// Uncomment the line below if you want to keep your containers running after VS Code shuts down.
+	// "shutdownAction": "none",
+
+	// Uncomment the next line to run commands after the container is created.
+	// "postCreateCommand": "npm install",
+
+	// Uncomment the next line to have VS Code connect as an existing non-root user in the container. See
+	// https://aka.ms/vscode-remote/containers/non-root for details on adding a non-root user if none exist.
+	// "remoteUser": "node",
+
+	// Add the IDs of extensions you want installed when the container is created in the array below.
+	"extensions": [
+		"dbaeumer.vscode-eslint"
+	]
+}

.devcontainer/docker-compose.yml

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+#-------------------------------------------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See https://go.microsoft.com/fwlink/?linkid=2090316 for license information.
+#-------------------------------------------------------------------------------------------------------------
+
+version: '3'
+services:
+  web:
+    # Uncomment the next line to use a non-root user for all processes. You can also
+    # simply use the "remoteUser" property in devcontainer.json if you just want VS Code
+    # and its sub-processes (terminals, tasks, debugging) to execute as the user. On Linux,
+    # you may need to update USER_UID and USER_GID in .devcontainer/Dockerfile to match your
+    # user if not 1000. See https://aka.ms/vscode-remote/containers/non-root for details.
+    # user: node
+
+    build: 
+      context: .
+      dockerfile: Dockerfile
+    
+    volumes:
+      - ..:/workspace:cached
+
+    environment:
+      PGPASSWORD: pass
+      PGUSER: user
+      PGDATABASE: data
+      PGHOST: db
+      
+    # Overrides default command so things don't shut down after the process ends.
+    command: sleep infinity
+
+    links:
+      - db
+
+  db:
+    image: postgres
+    restart: unless-stopped
+    ports: 
+      - 5432:5432
+    environment:
+      POSTGRES_PASSWORD: pass
+      POSTGRES_USER: user
+      POSTGRES_DB: data
+