Add staging k8s file for API, service, and route

src/main/k8s/staging.yml

+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: eclipsefdn-working-group-api-staging
+  namespace: foundation-internal-webdev-apps
+  labels:
+    app: eclipsefdn-working-group-api
+    environment: staging
+spec:
+  selector:
+    matchLabels:
+      app: eclipsefdn-working-group-api
+      environment: staging
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: eclipsefdn-working-group-api
+        environment: staging
+    spec:
+      affinity:
+        nodeAffinity:
+          preferredDuringSchedulingIgnoredDuringExecution:
+          - preference:
+              matchExpressions:
+              - key: speed
+                operator: NotIn
+                values:
+                - fast
+            weight: 1
+      containers:
+      - name: app
+        image: eclipsefdn/working-group-api:latest
+        imagePullPolicy: Always
+        ports:
+        - containerPort: 8080
+        resources:
+          limits:
+            cpu: '1'
+            memory: 256Mi
+          requests:
+            cpu: 200m
+            memory: 128Mi
+        env: 
+        - name: CONFIG_SECRET_PATH
+          value: "/run/secrets/working-group-api/secret.properties"
+        volumeMounts:
+        - name: secret-properties
+          mountPath: "/run/secrets/working-group-api"
+          readOnly: true
+      volumes:
+      - name: secret-properties
+        secret:
+          secretName: working-group-api
+---
+apiVersion: "v1"
+kind: "Service"
+metadata:
+  name: eclipsefdn-working-group-api-staging
+  namespace: foundation-internal-webdev-apps
+spec:
+  ports:
+  - name: "http"
+    port: 80
+    protocol: "TCP"
+    targetPort: 8080
+  selector:
+    app: eclipsefdn-working-group-api
+    environment: staging
+---
+apiVersion: "route.openshift.io/v1"
+kind: "Route"
+metadata:
+  name: eclipsefdn-working-group-api-staging
+  namespace: foundation-internal-webdev-apps
+  annotations:
+    haproxy.router.openshift.io/timeout: 20s
+    haproxy.router.openshift.io/disable_cookies: "true"
+    haproxy.router.openshift.io/balance: roundrobin
+spec:
+  host: "api-staging.eclipse.org"
+  path: "/working_groups"
+  port:
+    targetPort: "http"
+  tls:
+    insecureEdgeTerminationPolicy: "Redirect"
+    termination: "edge"
+  to:
+    kind: "Service"
+    name: eclipsefdn-working-group-api-staging
+    weight: 100
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