build: create docs test npm scripts

.kokoro/docs.sh

@@ -22,12 +22,4 @@ cd $(dirname $0)/..
 
 npm install
 
-npm run docs
-
-# Check broken links
-BIN=./node_modules/.bin
-
-npm install broken-link-checker
-npm install http-server
-$BIN/http-server -p 8080 docs/ &
-$BIN/blc http://localhost:8080 -r --exclude www.googleapis.com
+npm run docs-test

package.json

@@ -40,7 +40,9 @@
     "fix": "gts fix && eslint --fix '**/*.js'",
     "prepare": "npm run compile",
     "pretest": "npm run compile",
-    "presystem-test": "npm run compile"
+    "presystem-test": "npm run compile",
+    "docs-test": "blcl docs -r --exclude www.googleapis.com",
+    "predocs-test": "npm run docs"
   },
   "dependencies": {
     "@google-cloud/common": "^0.30.0",
@@ -75,6 +77,7 @@
     "prettier": "^1.13.5",
     "proxyquire": "^2.0.1",
     "source-map-support": "^0.5.6",
-    "typescript": "~3.3.0"
+    "typescript": "~3.3.0",
+    "broken-link-checker-local": "^0.2.0"
   }
 }