Feat/doc k8s (Commit-Boost#170)

* feat: add small documentation on how to setup via helm

* fix: nit

Author: aimxhaisse

k8s/README.md

@@ -0,0 +1,13 @@
+# Commit boost on k8s
+
+Currently, only the PBS module is supported and it can be used as a
+drop-in replacement to mev-boost. To quickly install it, from the
+chart directory, edit the `values.yaml` configuration file to your
+liking, then:
+
+```
+helm install commit-boost . -f values.yaml
+```
+
+By default the PBS service should be available on port `18550`, you
+can then point your beacons to it.