Add fly config

fly.toml

@@ -1,5 +1,10 @@
+# fly.toml file generated for empty-cherry-6843 on 2021-07-26T09:56:09-07:00
+
 app = "empty-cherry-6843"
 
+kill_signal = "SIGINT"
+kill_timeout = 5
+
 [build]
   builder = "heroku/buildpacks:20"
 
@@ -8,9 +13,20 @@ app = "empty-cherry-6843"
   APOLLO_GRAPH_REF = "Countries-gxmwa8@current"
   APOLLO_SCHEMA_REPORTING = true
 
+[experimental]
+  allowed_public_ports = []
+  auto_rollback = true
+
 [[services]]
+  http_checks = []
   internal_port = 8080
   protocol = "tcp"
+  script_checks = []
+
+  [services.concurrency]
+    hard_limit = 25
+    soft_limit = 20
+    type = "connections"
 
   [[services.ports]]
     handlers = ["http"]
@@ -19,3 +35,9 @@ app = "empty-cherry-6843"
   [[services.ports]]
     handlers = ["tls", "http"]
     port = 443
+
+  [[services.tcp_checks]]
+    grace_period = "1s"
+    interval = "15s"
+    restart_limit = 6
+    timeout = "2s"