fix(cli): exclude *.tsbuildinfo from Docker image

Fixes #3684

Author: raymondfeng

packages/cli/generators/app/templates/.dockerignore

@@ -1,4 +1,5 @@
 node_modules
 npm-debug.log
 /dist
-
+# Cache used by TypeScript's incremental build
+*.tsbuildinfo

packages/cli/test/integration/generators/app.integration.js

@@ -116,6 +116,7 @@ describe('app-generator specific files', () => {
   it('generates docker files', () => {
     assert.fileContent('Dockerfile', /FROM node:10-slim/);
     assert.fileContent('.dockerignore', /node_modules/);
+    assert.fileContent('.dockerignore', '*.tsbuildinfo');
 
     assert.fileContent('package.json', /"docker:build": "docker build/);
     assert.fileContent('package.json', /"docker:run": "docker run/);