Add chart values schema for documenting properties type

[petruki]

Under ojp-server chart add values.schema.json using the file structure below as example:

{
    "$schema": "https://json-schema.org/draft-07/schema#",
    "type": "object",
    "properties": {
        "app": {
            "type": "object",
            "properties": {
                "affinity": {
                    "type": "object"
                },
                "autoscaling": {
                    "type": "object",
                    "properties": {
                        "enabled": {
                            "type": "boolean"
                        },
                        "maxReplicas": {
                            "type": "integer"
                        },
                        "minReplicas": {
                            "type": "integer"
                        },
                        "targetCPUUtilizationPercentage": {
                            "type": "integer"
                        }
                    }
                },
                "env": {
                    "type": "object",
                    "properties": {
                        [OJP_SERVER_PROPERTIES]
                    }
                },
                "envFrom": {
                    "type": "array",
                    "items": {
                        "type": "object",
                        "properties": {
                            "configMapRef": {
                                "type": "object",
                                "properties": {
                                    "name": {
                                        "type": "string"
                                    }
                                }
                            }
                        }
                    }
                },
                "fullnameOverride": {
                    "type": "string"
                },
                "image": {
                    "type": "object",
                    "properties": {
                        "pullPolicy": {
                            "type": "string"
                        },
                        "repository": {
                            "type": "string"
                        },
                        "tag": {
                            "type": "string"
                        }
                    }
                },
                "imagePullSecrets": {
                    "type": "array"
                },
                "nameOverride": {
                    "type": "string"
                },
                "nodeSelector": {
                    "type": "object"
                },
                "podAnnotations": {
                    "type": "object"
                },
                "port": {
                    "type": "integer"
                },
                "replicaCount": {
                    "type": "integer"
                },
                "resources": {
                    "type": "object"
                },
                "service": {
                    "type": "object",
                    "properties": {
                        "port": {
                            "type": "integer"
                        },
                        "type": {
                            "type": "string"
                        }
                    }
                },
                "tolerations": {
                    "type": "array"
                }
            }
        }
    }
}