cmd/tip: manually scale talks to 1 instance

Disable health checker - it only causes trouble if we're running on one
instance. We'd rather see "starting up" than to have nothing served and
the instance killed when it doesn't come up ready in time.

Change-Id: I3396c626f840d606e0fb4a5ec4c0493195fd015f
Reviewed-on: https://go-review.googlesource.com/45654
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

cmd/tip/talks.yaml

@@ -1,18 +1,12 @@
-module: talks
+service: talks
 runtime: custom
-vm: true
+env: flex
 
-automatic_scaling:
-  min_num_instances: 1
-  max_num_instances: 5
+manual_scaling:
+  instances: 1
 
 env_variables:
   TIP_BUILDER: 'talks'
 
 health_check:
-  enable_health_check: True
-  check_interval_sec: 5
-  timeout_sec: 4
-  unhealthy_threshold: 2
-  healthy_threshold: 2
-  restart_threshold: 240
+  enable_health_check: False