chore: changes needed for Netlify PR previews (#500)

config/paths.js

@@ -26,7 +26,7 @@ function ensureSlash(inputPath, needsSlash) {
 }
 
 const getPublicUrl = appPackageJson =>
-    envPublicUrl || process.env.BUILD_ENV !== 'development' ? require(appPackageJson).homepage : '';
+    envPublicUrl || process.env.BUILD_ENV !== 'development' && process.env.NETLIFY !== 'true' ? require(appPackageJson).homepage : '';
 
 // We use `PUBLIC_URL` environment variable or "homepage" field to infer
 // "public path" at which the app is served.

netlify.toml

@@ -0,0 +1,10 @@
+# Global settings applied to the whole site.
+#
+# “publish” is the directory to publish (relative to root of your repo),
+# “command” is your build command,
+# “base” is directory to change to before starting build. if you set base:
+#    that is where we will look for package.json/.nvmrc/etc not repo root!
+
+[build]
+  publish = "build"
+  command = "npm run build-doc:netlify"

package.json

@@ -13,6 +13,7 @@
   "scripts": {
     "build-css": "node-sass-chokidar --include-path ./src --include-path ./node_modules src/ -o src/",
     "build-doc": "node scripts/build.js && cp build/index.html build/404.html",
+    "build-doc:netlify": "npm run build && NETLIFY=true npm run build-doc",
     "build-js": "node scripts/build.js",
     "build:lint:fix": "npm run build:lint -- --fix",
     "build:lint": "eslint 'src/**' --ext .js,.jsx --env browser,node",