Use Docker in the build to fix #534.

README.md

@@ -65,17 +65,19 @@ $ yarn run testnet local
 ---
 
 ### Production
-Get the Gaia binary from [GitHub](`https://github.com/cosmos/gaia/releases`).
+
+Building requires that [Docker](https://www.docker.com/get-docker) is installed
+on your system.  The build is made from code in the commit at `HEAD`, not from the files in the working tree.
 
 Build and run the app.
 ```bash
-yarn run build:{darwin|win32|linux} -- --binary={path to the gaia binary}
+yarn run build --platform={darwin|win32|linux}
 open builds/Cosmos-{platform}-x64/Cosmos.app
 ```
 
 When you are testing the build system you can skip the repackaging of the JS files.
 ```bash
-$ yarn run build:darwin -- --skip-pack --binary=...
+$ yarn run build --platform=darwin --skip-pack
 ```
 
 To test if your build worked run:

config.js

@@ -28,7 +28,6 @@ let config = {
     ignore: /^\/(src|index\.ejs|icons)/,
     out: path.join(__dirname, 'builds'),
     overwrite: true,
-    platform: process.env.PLATFORM_TARGET || 'darwin,linux,win32',
     packageManager: 'yarn'
   },
 

package.json

@@ -14,11 +14,7 @@
     "node": ">=9.4.0"
   },
   "scripts": {
-    "build:clean": "cross-env PLATFORM_TARGET=clean node tasks/release.js",
-    "build:darwin": "cross-env PLATFORM_TARGET=darwin node tasks/release.js",
-    "build:linux": "cross-env PLATFORM_TARGET=linux node tasks/release.js",
-    "build:mas": "cross-env PLATFORM_TARGET=mas node tasks/release.js",
-    "build:win32": "cross-env PLATFORM_TARGET=win32 node tasks/release.js",
+    "build": "cd tasks/build && ./build.sh",
     "local": "yarn run testnet local",
     "testnet": "node tasks/testnet.js",
     "lint": "eslint --ext .js,.vue -f ./node_modules/eslint-friendly-formatter app test",
@@ -69,6 +65,7 @@
     "json-loader": "^0.5.4",
     "lodash": "^4.17.4",
     "markdown-it": "^8.3.2",
+    "minimist": "1.2.0",
     "mkdirp": "^0.5.1",
     "moment-timezone": "~0.5.13",
     "node-loader": "^0.6.0",