problem: reading yaml to both plain properties and structured objects is a mess

solution: use just objects for configs

demo/quick-start/dshackle.yaml

@@ -2,5 +2,20 @@ version: v1
 port: 2449
 tls:
   enabled: false
+
 upstreams:
-  config: upstreams.yaml
+  upstreams:
+    - id: infura-eth
+      chain: ethereum
+      connection:
+        ethereum:
+          rpc:
+            url: "https://mainnet.infura.io/v3/${INFURA_USER}"
+          ws:
+            url: "wss://mainnet.infura.io/ws/v3/${INFURA_USER}"
+    - id: infura-kovan
+      chain: kovan
+      connection:
+        ethereum:
+          rpc:
+            url: "https://kovan.infura.io/v3/${INFURA_USER}"

demo/quick-start/upstreams.yaml

@@ -1,16 +0,0 @@
-version: v1
-upstreams:
-  - id: infura-eth
-    chain: ethereum
-    connection:
-      ethereum:
-        rpc:
-          url: "https://mainnet.infura.io/v3/${INFURA_USER}"
-        ws:
-          url: "wss://mainnet.infura.io/ws/v3/${INFURA_USER}"
-  - id: infura-kovan
-    chain: kovan
-    connection:
-      ethereum:
-        rpc:
-          url: "https://kovan.infura.io/v3/${INFURA_USER}"