fixing problem with cluster init for haproxy example

Author: timveil

example-haproxy/docker-compose.yml

@@ -6,7 +6,7 @@ services:
     container_name: crdb-0
     hostname: crdb-0
     image: cockroachdb/cockroach:latest
-    command: start-single-node --cluster-name=example-haproxy --logtostderr=WARNING --log-file-verbosity=WARNING --insecure
+    command: start --cluster-name=example-haproxy --logtostderr=WARNING --log-file-verbosity=WARNING --insecure --join=crdb-0
 
   crdb-1:
     container_name: crdb-1
@@ -46,6 +46,7 @@ services:
     environment:
       - COCKROACH_HOST=crdb-0:26257
       - COCKROACH_INSECURE=true
+      - COCKROACH_INIT=true
       - DATABASE_NAME=test
     depends_on:
       - lb