How to define page border offset

[atypical-atip]

Hi! I;ve encountered a problem and couldn't find an answer either in docs or in demos nor in code. How can I define page border offset?
My code:

properties: {
                     page: {
                        margin: {
                            top: convertMillimetersToTwip(15),
                            right: convertMillimetersToTwip(15),
                            bottom: convertMillimetersToTwip(15),
                            left: convertMillimetersToTwip(15),
                        },
                        borders: {
                            pageBorderBottom: {
                                style: BorderStyle.THIN_THICK_THIN_SMALL_GAP,
                                size: 3 * 8,
                                color: "000000",
                            },
                            pageBorderLeft: {
                                style: BorderStyle.THIN_THICK_THIN_SMALL_GAP,
                                size: 3 * 8,
                                color: "000000",
                            },
                            pageBorderRight: {
                                style: BorderStyle.THIN_THICK_THIN_SMALL_GAP,
                                size: 3 * 8,
                                color: "000000",
                            },
                            pageBorderTop: {
                                style: BorderStyle.THIN_THICK_THIN_SMALL_GAP,
                                size: 3 * 8,
                                color: "000000",
                            },
                            pageBorders: {
                                display: PageBorderDisplay.FIRST_PAGE,
                                offsetFrom: PageBorderOffsetFrom.PAGE,
                                zOrder: PageBorderZOrder.FRONT,
                            },
                        },
                    },
                },
                children: [...]

When I add page border it appears on page edeges but I want it to appear according to page margins. T

hanks for the help!