Add Kubernetes configuration

kubernetes/postgres.yaml

@@ -0,0 +1,58 @@
+apiVersion: apps/v1
+kind: StatefulSet
+metadata:
+  name: postgres
+spec:
+  replicas: 1
+  serviceName: postgres
+  selector:
+    matchLabels:
+      app: postgres
+  template:
+    metadata:
+      labels:
+        app: postgres
+    spec:
+      containers:
+        - name: postgres
+          image: postgres:15.2
+          env:
+            - name: POSTGRES_USER
+              valueFrom:
+                configMapKeyRef:
+                  name: restserver-config
+                  key: DOCSPELL_SERVER_BACKEND_JDBC_USER
+            - name: POSTGRES_PASSWORD
+              valueFrom:
+                secretKeyRef:
+                  name: restserver-secrets
+                  key: DOCSPELL_SERVER_BACKEND_JDBC_PASSWORD
+            - name: POSTGRES_DB
+              value: dbname
+          ports:
+            - name: postgres
+              containerPort: 5432
+          volumeMounts:
+            - name: postgres-data
+              mountPath: /var/lib/postgresql/data
+  volumeClaimTemplates:
+    - metadata:
+        name: postgres-data
+      spec:
+        accessModes: [ "ReadWriteOnce" ]
+        resources:
+          requests:
+            storage: 1Gi
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: postgres
+spec:
+  selector:
+    app: postgres
+  ports:
+    - name: postgres
+      port: 5432
+      targetPort: postgres
+  clusterIP: None