run unit tests when build docker

Dockerfile

@@ -44,3 +44,5 @@ VOLUME [ "/bot" ]
 
 ENTRYPOINT [ "/wechaty/bin/entrypoint.sh" ]
 CMD [ "start" ]
+
+RUN npm test

package.json

@@ -29,7 +29,7 @@
     "posttest": "npm run clean && npm run sloc",
     "test:phantomjs": "cross-env LC_ALL=C WECHATY_LOG=info WECHATY_HEAD=phantomjs ava --timeout=7m \"dist/test/*.spec.js\"",
     "test:phantomjs.bak": "cross-env LC_ALL=C WECHATY_LOG=info WECHATY_HEAD=phantomjs ava --timeout=7m \"dist/{src,test}/**/*.spec.js\"",
-    "test:chrome": "cross-env LC_ALL=C WECHATY_LOG=verbose WECHATY_HEAD=chrome ava --concurrency 0 --verbose --ext js --timeout=7m \"dist/{src,test}/**/*.spec.js\"",
+    "test:chrome": "cross-env LC_ALL=C WECHATY_LOG=verbose WECHATY_HEAD=chrome ava --serial --verbose --ext js --timeout=7m \"dist/{src,test}/**/*.spec.js\"",
     "testdev": "cross-env LC_ALL=C WECHATY_LOG=silly ava --ext ts --serial --verbose --fail-fast --timeout=3m",
     "testdist": "cross-env WECHATY_LOG=SILLY WECHATY_HEAD=chrome ava --ext ts --verbose --fail-fast --timeout=2m",
     "ava": "cross-env LC_ALL=C WECHATY_LOG=verbose ts-node node_modules/.bin/ava \"{src,test}/**/*.spec.js\"",