added required k8s and docker file

k8s/base/postgres-statefulset.yaml

@@ -0,0 +1,59 @@
+apiVersion: apps/v1
+kind: StatefulSet
+metadata:
+  name: postgres
+  namespace: ecommerce
+  labels:
+    app: postgres
+spec:
+  serviceName: postgres
+  replicas: 1
+  selector:
+    matchLabels:
+      app: postgres
+  template:
+    metadata:
+      labels:
+        app: postgres
+    spec:
+      securityContext:
+        fsGroup: 999
+      containers:
+        - name: postgres
+          image: postgres:15-alpine
+          ports:
+            - containerPort: 5432
+          env:
+            - name: POSTGRES_DB
+              value: "vaishnavi_db"
+            - name: POSTGRES_USER
+              value: "vaishnavi"
+            - name: POSTGRES_PASSWORD
+              value: "admin"
+            - name: PGDATA
+              value: "/var/lib/postgresql/data/pgdata"
+          volumeMounts:
+            - name: postgres-data
+              mountPath: /var/lib/postgresql/data
+          resources:
+            requests:
+              cpu: "100m"
+              memory: "256Mi"
+            limits:
+              cpu: "500m"
+              memory: "512Mi"
+          readinessProbe:
+            exec:
+              command: [pg_isready, -U, vaishnavi, -d, vaishnavi_db]
+            initialDelaySeconds: 10
+            periodSeconds: 5
+            failureThreshold: 6
+          livenessProbe:
+            exec:
+              command: [pg_isready, -U, vaishnavi, -d, vaishnavi_db]
+            initialDelaySeconds: 30
+            periodSeconds: 10
+      volumes:
+        - name: postgres-data
+          persistentVolumeClaim:
+            claimName: postgres-data