Add production environment, replication for garage

Also deploy a third node in a different data center

environments/production.json

@@ -0,0 +1,10 @@
+{
+  "name": "production",
+  "override_attributes": {
+    "garage": {
+      "replication_mode": "2",
+      "s3_api_root_domain": ".s3.garage.kosmos.org",
+      "s3_web_root_domain": ".web.garage.kosmos.org"
+    }
+  }
+}