fix(infrastructure): update docker command to run new image (#923)

Author: Matt Goo

Dockerfile

@@ -1,6 +1,9 @@
 # based off https://github.com/GoogleChrome/puppeteer/blob/master/docs/troubleshooting.md#running-puppeteer-in-docker
 FROM node:10-slim
 
+# https://superuser.com/questions/1423486/issue-with-fetching-http-deb-debian-org-debian-dists-jessie-updates-inrelease
+RUN printf "deb http://archive.debian.org/debian/ jessie main\ndeb-src http://archive.debian.org/debian/ jessie main\ndeb http://security.debian.org jessie/updates main\ndeb-src http://security.debian.org jessie/updates main" > /etc/apt/sources.list
+
 # See https://crbug.com/795759
 RUN apt-get update && apt-get install -yq libgconf-2-4 git vim
 

docs/screenshot-tests.md

@@ -103,7 +103,7 @@ You may need to update the Docker image. Follow these steps:
 From the project's root directory run the following command:
 
 ```
-docker build -t screenshots .
+docker build --no-cache -t screenshots .
 ```
 
 This command builds a Docker image named `screenshots` based off the `Dockerfile` found in the root directory. Next push this to the Docker Hub for Travis tests. If you are testing you may want to use a different [tag](https://hub.docker.com/r/mdcreact/screenshots/tags/) in the interim.