Append Hello World to all README.md files

Author: Sourcegraph

docker-images/README.md

@@ -30,3 +30,4 @@ Note: `$MY_VERSION` above should reflect the underlying Alpine version. If chang
 1. Create a `build.sh` and add your publishing script to it - the script should end with `docker tag ... "$IMAGE"`. See the scripts in this directory for examples.
 2. Ensure your new script is executable with `chmod +x build.sh` (you can try it via e.g. `IMAGE=fake-repo/cadvisor:latest docker-images/$SERVICE/build.sh`, or by [building a test image](https://about.sourcegraph.com/handbook/engineering/deployments#building-docker-images-for-a-specific-branch))
 3. Add an image to the automated builds pipeline by adding it to [`SourcegraphDockerImages`](https://sourcegraph.com/search?q=repo:%5Egithub%5C.com/sourcegraph/sourcegraph%24+file:%5Eenterprise/dev/ci/images/images%5C.go+SourcegraphDockerImages&patternType=literal).
+Hello Again!

docker-images/cadvisor/README.md

@@ -1,3 +1,4 @@
 # Sourcegraph cAdvisor
 
 Learn more about the Sourcegraph cAdvisor distribution in the [cAdvisor documentation](https://docs.sourcegraph.com/dev/background-information/observability/cadvisor).
+Hello Again!

docker-images/grafana/README.md

@@ -24,3 +24,4 @@ will be detected automatically while Grafana is running.
 
 More behavior can be controlled with
 [environmental variables](https://grafana.com/docs/installation/configuration/).
+Hello Again!

docker-images/ignite-ubuntu/README.md

@@ -3,3 +3,4 @@
 We produce a version of Ubuntu 20.04 (Focal Fossa) based on [weaveworks/ignite-ubuntu:20.04-amd64](https://github.com/weaveworks/ignite/blob/46bdd5d48425c4245fbe895e7da3621f491c3660/images/ubuntu/Dockerfile) that also contains the Docker distribution.
 
 This image serves as the base image for [Firecracker](https://github.com/firecracker-microvm/firecracker) virtual machines in which we run user configured containers and code.
+Hello Again!

docker-images/prometheus/README.md

@@ -29,3 +29,4 @@ You can specify additional flags to pass to Prometheus by setting the environmen
 `prom-wrapper` also accepts a few configuration options through environment variables - see [`cmd/prom-wrapper/main.go`](./cmd/prom-wrapper/main.go) for more details.
 
 Alertmanager components can be disabled entirely with `DISABLE_ALERTMANAGER=true`.
+Hello Again!

docker-images/prometheus/cmd/prom-wrapper/README.md

@@ -1,3 +1,4 @@
 # prom-wrapper
 
 Prom-wrapper is a service that ships with the [Sourcegraph Prometheus image](https://docs.sourcegraph.com/dev/background-information/observability/prometheus).
+Hello Again!