Docker file cleanup (#4397)

.dockerignore

@@ -4,5 +4,7 @@
 !package.json
 !LICENSE
 !npm-shrinkwrap.json
-!docker
+!docker/adb
+!docker/scripts
 !tools/postinstall.js
+!docker/webpagereplay/

Dockerfile

@@ -31,7 +31,8 @@ COPY npm-shrinkwrap.json /usr/src/app/
 COPY tools/postinstall.js /usr/src/app/tools/postinstall.js
 RUN npm install --production && npm cache clean --force 
 
-COPY . /usr/src/app
+COPY ./bin/ /usr/src/app/bin/
+COPY ./lib/ /usr/src/app/lib/
 RUN rm -fR /usr/src/app/node_modules/selenium-webdriver/bin
 
 COPY docker/scripts/start.sh /start.sh