Keycloak + nginx reverse proxy (#63)

* Example Keycloak config.

* Proxy for geth, ipld-eth-server, and lighthouse.

* Add metrics.

app/data/container-image-list.txt

@@ -16,3 +16,4 @@ cerc/watcher-mobymask
 cerc/test-container
 cerc/eth-probe
 cerc/builder-js
+cerc/keycloak

app/data/pod-list.txt

@@ -13,3 +13,4 @@ fixturenet-eth
 watcher-mobymask
 test
 eth-probe
+keycloak