feat(k8s): add database migration job manifest

apps/nxtgauge-backend-rust/base/migration-job.yaml

@@ -0,0 +1,36 @@
+apiVersion: batch/v1
+kind: Job
+metadata:
+  name: nxtgauge-db-migrate
+  namespace: nxtgauge
+  labels:
+    app: nxtgauge-db-migrate
+    tier: database
+  annotations:
+    description: "Runs database migrations for nxtgauge backend"
+spec:
+  ttlSecondsAfterFinished: 300
+  backoffLimit: 3
+  template:
+    metadata:
+      labels:
+        app: nxtgauge-db-migrate
+    spec:
+      restartPolicy: OnFailure
+      containers:
+        - name: migrate
+          image: registry.nxtgauge.com:5000/nxtgauge-db-migrate:latest
+          imagePullPolicy: Always
+          envFrom:
+            - secretRef:
+                name: nxtgauge-backend-rust-secrets
+          env:
+            - name: MIGRATIONS_DIR
+              value: "/migrations"
+          resources:
+            requests:
+              memory: "64Mi"
+              cpu: "50m"
+            limits:
+              memory: "256Mi"
+              cpu: "500m"