add app init files

apps/base/06-gateway.yaml

@@ -0,0 +1,48 @@
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: gateway
+  namespace: epcare
+spec:
+  selector:
+    app: gateway
+  ports:
+    - name: http
+      protocol: TCP
+      port: 80
+      targetPort: 80
+  type: ClusterIP
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: gateway
+  namespace: epcare
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: gateway
+  template:
+    metadata:
+      labels:
+        app: gateway
+    spec:
+      nodeSelector:
+        kubernetes.io/hostname: NODE_HOSTNAME
+      imagePullSecrets:
+        - name: gitlab-registry
+      initContainers:
+        - name: wait-for-frontend
+          image: busybox:1.36
+          command: ['sh', '-c', 'until nc -z frontend 80; do echo "waiting for frontend..."; sleep 3; done']
+        - name: wait-for-backend
+          image: busybox:1.36
+          command: ['sh', '-c', 'until nc -z backend 8080; do echo "waiting for backend..."; sleep 3; done']
+      containers:
+        - name: gateway
+          image: registry.gitlab.com/signalytic/client-external/epcare/gateway/arm64:1.0
+          imagePullPolicy: IfNotPresent
+          ports:
+            - containerPort: 80