Add kubernetes deployment support

build/kubernetes/api-server-deployment.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: api-server
+spec:
+  replicas: 3
+  selector:
+    matchLabels:
+      app: api-server
+  template:
+    metadata:
+      labels:
+        app: api-server
+    spec:
+      initContainers:
+        - name: wait-for-psql
+          image: busybox
+          command: ['sh', '-c', 'until nc -z psql-service 5432; do echo waiting for postgres readiness; sleep 2; done;']
+      containers:
+        - name: api-server
+          image: registry.lab.divyam.dev/fastbin-api-server:latest
+          ports:
+            - containerPort: 8080
+          env:
+            - name: DB_DATABASE
+              valueFrom:
+                configMapKeyRef:
+                  name: fastbin-config
+                  key: DB_DATABASE
+            - name: DB_USERNAME
+              valueFrom:
+                configMapKeyRef:
+                  name: fastbin-config
+                  key: DB_USERNAME
+            - name: DB_PASSWORD
+              valueFrom:
+                configMapKeyRef:
+                  name: fastbin-config
+                  key: DB_PASSWORD
+            - name: DB_HOST
+              valueFrom:
+                configMapKeyRef:
+                  name: fastbin-config
+                  key: DB_HOST
+            - name: DB_PORT
+              valueFrom:
+                configMapKeyRef:
+                  name: fastbin-config
+                  key: DB_PORT
+            - name: KEYGEN_HOST
+              valueFrom:
+                configMapKeyRef:
+                  name: fastbin-config
+                  key: KEYGEN_HOST
+
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: api-server-service
+spec:
+  ports:
+    - port: 80
+      targetPort: 8080
+  selector:
+    app: api-server
+  type: LoadBalancer

build/kubernetes/example.configmap.yaml

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+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: fastbin-config
+data:
+  DB_DATABASE: "fastbin"
+  DB_USERNAME: "username"
+  DB_PASSWORD: "password"
+  DB_HOST: "psql-service"
+  DB_PORT: "5432"
+  KEYGEN_HOST: "keygen-service"

build/kubernetes/keygen-deployment.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: keygen
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: keygen
+  template:
+    metadata:
+      labels:
+        app: keygen
+    spec:
+      containers:
+        - name: keygen
+          image: registry.lab.divyam.dev/fastbin-keygen-service:latest
+          ports:
+            - containerPort: 8080
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: keygen-service
+spec:
+  ports:
+    - port: 8080
+      targetPort: 8080
+  selector:
+    app: keygen

build/kubernetes/postgres-deployment.yaml

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+apiVersion: v1
+kind: PersistentVolume
+metadata:
+  name: psql-pv
+spec:
+  capacity:
+    storage: 5Gi
+  accessModes:
+    - ReadWriteOnce
+  hostPath:
+    path: /mnt/data/postgres
+---
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: psql-volume-claim
+  labels:
+    type: local
+spec:
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: 2Gi
+
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: psql-bp
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: psql-bp
+  template:
+    metadata:
+      labels:
+        app: psql-bp
+    spec:
+      containers:
+        - name: postgres
+          image: postgres:latest
+          env:
+            - name: POSTGRES_DB
+              valueFrom:
+                configMapKeyRef:
+                  name: fastbin-config
+                  key: DB_DATABASE
+            - name: POSTGRES_USER
+              valueFrom:
+                configMapKeyRef:
+                  name: fastbin-config
+                  key: DB_USERNAME
+            - name: POSTGRES_PASSWORD
+              valueFrom:
+                configMapKeyRef:
+                  name: fastbin-config
+                  key: DB_PASSWORD
+          volumeMounts:
+            - mountPath: /var/lib/postgresql/data
+              name: psql-storage
+          readinessProbe:
+            exec:
+              command:
+                - sh
+                - "-c"
+                - "pg_isready -U $POSTGRES_USER -d $POSTGRES_DB"
+            initialDelaySeconds: 5
+            periodSeconds: 5
+            timeoutSeconds: 5
+            failureThreshold: 5
+      volumes:
+        - name: psql-storage
+          persistentVolumeClaim:
+            claimName: psql-volume-claim
+
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: psql-service
+spec:
+  ports:
+    - port: 5432
+      targetPort: 5432
+  selector:
+    app: psql-bp