Add VSCode devcontainers

Should be useful for getting a development environment setup quickly.

.devcontainer/devcontainer.json

@@ -0,0 +1,10 @@
+{
+  "name": "Homebrew/brew",
+  "image": "ghcr.io/homebrew/brew:latest",
+  "workspaceFolder": "/home/linuxbrew/.linuxbrew/Homebrew",
+  "workspaceMount": "source=${localWorkspaceFolder},target=/home/linuxbrew/.linuxbrew/Homebrew,type=bind,consistency=cached",
+  "onCreateCommand": ".devcontainer/on-create-command.sh",
+  "remoteEnv": {
+    "HOMEBREW_GITHUB_API_TOKEN": "${localEnv:GITHUB_TOKEN}"
+  }
+}

.devcontainer/on-create-command.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+set -e
+
+sudo apt-get update
+sudo apt-get install -y \
+  -o Dpkg::Options::=--force-confdef \
+  -o Dpkg::Options::=--force-confnew \
+  zsh \
+  shellcheck \
+  zsh-autosuggestions

.devcontainer/ubuntu18.04/devcontainer.json

@@ -0,0 +1,10 @@
+{
+  "name": "Homebrew/brew-ubuntu18.04",
+  "image": "ghcr.io/homebrew/ubuntu18.04:latest",
+  "workspaceFolder": "/home/linuxbrew/.linuxbrew/Homebrew",
+  "workspaceMount": "source=${localWorkspaceFolder},target=/home/linuxbrew/.linuxbrew/Homebrew,type=bind,consistency=cached",
+  "onCreateCommand": ".devcontainer/on-create-command.sh",
+  "remoteEnv": {
+    "HOMEBREW_GITHUB_API_TOKEN": "${localEnv:GITHUB_TOKEN}"
+  }
+}

.gitignore

@@ -171,7 +171,8 @@
 # Unignore our `brew` script.
 !/bin/brew
 
-# Unignore our documentation/completions.
+# Unignore our configuration/completions/documentation.
+!/.devcontainer
 !/.github
 !/completions
 !/docs