index.ts (stateful app: pod scheduling)

            spec: {
                serviceAccountName: "default",
                securityContext: {
                    fsGroup: 1001,
                    runAsUser: 1001
                },
                affinity: {
                    podAntiAffinity: {
                        preferredDuringSchedulingIgnoredDuringExecution: [
                            {
                                weight: 1,
                                podAffinityTerm: {
                                    topologyKey: "kubernetes.io/hostname",
                                    labelSelector: {
                                        matchLabels: {
                                            app: "mariadb",
                                            release: "example"
                                        }
                                    }
                                }
                            }
                        ]
                    }
                },