fix(Dockerfile) remove apt lists from layer

.gitignore

@@ -1 +1 @@
-.idea/
+node_modules/

Dockerfile

@@ -31,7 +31,9 @@ RUN echo 'debconf debconf/frontend select Noninteractive' | debconf-set-selectio
     && rm -r /var/lib/apt/lists/*
 
 # See https://crbug.com/795759
-RUN apt-get update && apt-get install -yq libgconf-2-4
+RUN apt-get update && apt-get install -yq libgconf-2-4 \
+  && apt-get clean \
+  && rm -r /var/lib/apt/lists/*
 
 # Install latest chrome dev package.
 # Note: this installs the necessary libs to make the bundled version of Chromium that Puppeteer

node_modules/.yarn-integrity

@@ -1 +0,0 @@
-549854b8a60607db81d4c58008d59f812d744acba026266f380acd942941356a