chore(kontemplate): Prepare kontemplate for depot-merge

This merge will not yet include moving over to buildGo.nix, as support
for testing and such is not present in that library yet.

ops/kontemplate/example/some-api/some-api.yaml

@@ -0,0 +1,52 @@
+---
+apiVersion: v1
+kind: Secret
+metadata:
+  name: secret-certificate
+data:
+  cert.pem: {{ passLookup "my/secret/certificate" | b64enc }}
+---
+apiVersion: extensions/v1beta1
+kind: ConfigMap
+metadata:
+  name: some-config
+data:
+  # The content of the example configuration file is templated in here
+  # by the 'insertFile' function and indented for YAML-compatibility
+  # with the 'indent' function:
+  some.cfg: |
+{{ insertFile "some.cfg" | indent 4 }}
+---
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: some-api
+spec:
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: some-api
+    spec:
+      containers:
+        - image: my.container.repo/some-api:{{ .version }}
+          name: some-api
+          env:
+            - name: ENABLE_IMPORTANT_FEATURE
+              value: {{ .importantFeature }}
+            - name: SOME_GLOBAL_VAR
+              value: {{ .globalVar }}
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: some-api
+  labels:
+    app: some-api
+spec:
+  selector:
+    app: some-api
+  ports:
+    - port: 80
+      targetPort: {{ .apiPort }}
+      name: http