Basic shell changes + docker build system.

Dockerfile

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+# Installation Builder
+FROM golang:1.7.3-alpine
+MAINTAINER Author.io
+
+ADD ./app /app
+WORKDIR /app
+
+RUN apk add -U git \
+  && cd /app \
+  && export PATH=$PATH:$GOPATH/bin \
+  && go get github.com/inconshreveable/go-update \
+  && go get gopkg.in/urfave/cli.v2 \
+  && go get github.com/olekukonko/tablewriter \
+  && apk del git \
+  && rm -rf /tmp/* /var/cache/apk/*

README.md

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+# switch
+Switch is a Node.js Version Management utility.
+**Key Features:**
+- [ ] Installation
+- [ ] Switching
+- [ ] Hooks
+  - [ ] Pre-Install
+  - [ ] Post-Install
+  - [ ] Pre-Use
+  - [ ] Post-Use
+- [ ] Shared Global npm Modules (optional)
+- [ ] Download Mirror Support
+- [ ] Daemon
+  - [ ] Web Dashboard
+  - [ ] Notifications? (new Node versions)
+- [ ] Install Shortcuts
+  - [ ] lts
+  - [ ] latest
+  - [ ] MAJOR (ex: `6` installs `6.9.1`)
+  - [ ] MINOR (ex: `6.9` installs `6.9.1`)
+- [ ] npm fallback
+- [ ] Automatic Updates
+**Available For:**
+- [ ] Windows 8/8.1/10
+  - [ ] GUI, .msi, silent installer
+  - [ ] Chocolatey
+- [ ] macOS
+  - [ ] dmg/app
+  - [ ] homebrew
+- [ ] Linux
+  - [ ] rpm
+  - [ ] yum
+  - [ ] apt-get
+  - [ ] apk
+- [ ] Docker
+- [ ] IBMi?
+
 [![Tweet This!][1.1] Tweet This!][1]
 [1.1]: http://i.imgur.com/wWzX9uB.png (Tweet about NVM for Windows)
 [1]: https://twitter.com/intent/tweet?hashtags=nodejs&original_referer=http%3A%2F%2F127.0.0.1%3A91%2F&text=Check%20out%20NVM%20for%20Windows!&tw_p=tweetbutton&url=http%3A%2F%2Fgithub.com%2Fcoreybutler%2Fnvm-windows&via=goldglovecb

app/switch.go

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+package main
+
+import (
+  "io"
+  "os"
+  "github.com/olekukonko/tablewriter"
+)
+
+const (
+  AppName = "switch"
+  AppVersion = "1.0.0"
+  Description = ""
+)
+
+func main() {
+  help()
+}
+
+func log(msg string) {
+  io.WriteString(os.Stdout, msg)
+}
+
+func cmd(subcmd string) string {
+  return AppName + " " + subcmd
+}
+
+func xcmd(subcmd string) string {
+  return "[X] " + AppName + " " + subcmd
+}
+
+func help() {
+  log("\nRunning " + AppName + " v" + AppVersion + ".")
+  log("\n\nUsage:\n\n")
+
+  data := [][]string{
+    []string{xcmd("install <version> [arch]"), "The <version> can be a specific Node.js semantic version number, \"latest\" for the latest available release, or \"lts\" for the latest LTS release. Optionally specify whether to install the 32 or 64 bit version (defaults to system arch). Set [arch] to \"all\" to install 32 AND 64 bit versions."},
+    []string{xcmd("uninstall <version>"), "Must be a specific version (x.x.x)."},
+  }
+
+  table := tablewriter.NewWriter(os.Stdout)
+  table.SetBorder(false)
+  table.SetCenterSeparator("")
+  table.SetColumnSeparator("")
+  table.SetColWidth(40)
+  table.AppendBulk(data)
+  table.Render()
+
+  log("\n\nCopyright (c) 2017 Author.io and Contributors.\n\n")
+}

build.sh

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+#!/bin/sh
+docker run --rm \
+  --name switch-builder \
+  -e GOOS=windows \
+  -e GOARCH=386 \
+  -v "$(pwd)/out:/out" \
+  -v "$(pwd)/app:/app" \
+  switch go build -o /out/switch.exe /app/switch.go

dev.sh

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+#!/bin/sh
+docker run --rm -it \
+  --name switch-builder \
+  -e GOOS=linux \
+  -e GOARCH=386 \
+  -v "$(pwd)/app:/app" \
+  switch sh

mkenv.sh

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+#!/bin/sh
+docker build -t switch .