chore(heroku): add heroku deploy via travis (#3116)

.travis.yml

@@ -27,6 +27,8 @@ stages:
     if: ( branch = development AND type = push ) OR type = pull_request
   - name: deploy-surge
     if: branch = development AND type = push
+  - name: deploy-heroku
+    if: branch = development AND type = push
   - name: sauce-tests
     if: ( branch = development AND type = push ) OR type = pull_request
 
@@ -110,6 +112,14 @@ jobs:
         project: ./gh-pages/
         domain: ngx-bootstrap-latest.surge.sh
         on: development
+    - stage: deploy-heroku
+      script: npm run build:dynamic
+      deploy:
+        provider: heroku
+        api_key: $HEROKU_API_KEY
+        skip_cleanup: true
+        app: ngx-universal
+        on: development
 
 cache:
   apt: true

Procfile

@@ -0,0 +1 @@
+web: node demo/dist/server.js

package.json

@@ -13,7 +13,7 @@
     "demo.deploy-gh-pages": "gh-pages -d gh-pages",
     "demo.build": "run-s build link demo.gen-docs demo.ng-build demo.set-version",
     "demo.serve": "run-s demo.build lite-server",
-    "demo.serve-universal": "run-s build link build:dynamic serve:dynamic",
+    "demo.serve-universal": "run-s build:dynamic serve:dynamic",
     "demo.deploy": "run-s demo.build demo.deploy-gh-pages",
     "link": "ngm link -p src --here",
     "lint-pretty": "prettier --config .prettierrc --write -l  \"{demo/src,src}/**/*.ts\"",
@@ -39,7 +39,7 @@
     "e2e": "protractor",
     "e2e-cross": "SAUCE=true npm run e2e",
     "view-stats": "webpack-bundle-analyzer demo/dist/stats.json",
-    "build:dynamic": "npm run build:client-and-server-bundles && npm run webpack:server",
+    "build:dynamic": "run-s build link build:client-and-server-bundles webpack:server",
     "serve:dynamic": "node demo/dist/server.js",
     "build:client-and-server-bundles": "ng build -bh / --prod --env=server && ng build -bh / --prod --env=server --app 1 --output-hashing=false",
     "webpack:server": "webpack --config ./scripts/universal/webpack.server.config.js --progress --colors"