Upgrade to recent ubuntu image on circleci

Robin Sonefors · Robin Sonefors · commit f5d5d5ada5ff · 2022-03-16T11:30:37.000Z
CircleCI is retiring the ubuntu 14.whatever which is the default, and is sending increasingly exasperated emails about it. I borrowed the machine version from weaveworks/launcher#334 - there may or may not be a newer version available, but using the same is great for grepability.
diff --git a/.circleci/config.yml b/.circleci/config.yml
@@ -1,6 +1,7 @@
 version: 2
 defaults: &defaults
   machine:
+    image: ubuntu-2004:202201-02
     docker_layer_caching: true
   working_directory: /home/circleci/src/github.com/weaveworks/service
   environment:
