deploy: add deployment configuration for a gotip playground instance

For now, just define GCP configuration. In a subsequent CL we should
parameterize the playground UI to indicate that this is tip go.

Updates golang/go#48517

Change-Id: I8a885126b95f60e02f46f7557cada2ec2e0b2882
Reviewed-on: https://go-review.googlesource.com/c/playground/+/362854
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Alexander Rakoczy <alex@golang.org>

Author: findleyr

app.gotip.yaml

@@ -0,0 +1,3 @@
+service: gotipplay
+includes:
+- playground.yaml

app.yaml

@@ -1,20 +1,3 @@
 service: play
-runtime: custom
-env: flex
-
-network:
-  name: projects/golang-org/global/networks/golang
-
-resources:
-  cpu: 2
-  memory_gb: 2
-
-automatic_scaling:
-  min_num_instances: 5
-
-readiness_check:
-  path: "/_ah/health"
-  check_interval_sec: 10
-
-env_variables:
-  MEMCACHED_ADDR: 'memcached-play-golang:11211'
+includes:
+- playground.yaml

deploy/deploy_gotip.json

@@ -0,0 +1,30 @@
+{
+  "steps": [
+    {
+      "name": "gcr.io/cloud-builders/docker",
+      "entrypoint": "bash",
+      "args": [
+        "-c",
+        "docker build --build-arg GO_VERSION=master -t gcr.io/$PROJECT_ID/playground-gotip ."
+      ]
+    },
+    {
+      "name": "gcr.io/cloud-builders/docker",
+      "args": [
+        "push",
+        "gcr.io/$PROJECT_ID/playground-gotip"
+      ]
+    },
+    {
+      "name": "gcr.io/cloud-builders/gcloud",
+      "args": [
+        "app",
+        "deploy",
+        "app.gotip.yaml",
+        "--project=$PROJECT_ID",
+        "--image-url=gcr.io/$PROJECT_ID/playground-gotip:latest"
+      ]
+    }
+  ],
+  "timeout": "1800s"
+}

playground.yaml

@@ -0,0 +1,21 @@
+# Shared configuration for playground App Engine instances.
+runtime: custom
+env: flex
+
+network:
+  name: projects/golang-org/global/networks/golang
+
+resources:
+  cpu: 2
+  memory_gb: 2
+
+automatic_scaling:
+  min_num_instances: 5
+
+readiness_check:
+  path: "/_ah/health"
+  check_interval_sec: 10
+
+env_variables:
+  MEMCACHED_ADDR: 'memcached-play-golang:11211'
+