add eslintignore to the dockerfile where we run eslint

client/Dockerfile

@@ -3,4 +3,4 @@ WORKDIR /home/weave
 COPY package.json /home/weave/
 # Dont install optional developer tools
 RUN npm install --no-optional
-COPY webpack.local.config.js webpack.production.config.js server.js .eslintrc /home/weave/
+COPY webpack.local.config.js webpack.production.config.js server.js .eslintrc .eslintignore /home/weave/