Arduino for STM32

I understood. Thank you for your answer. So, I don't want to use STM32CubeProgrammer while programming my board from Arduino. I don't want to use an external debugger. Is this possible? If possible, how can I do?

You said "You don't need to use the boot pin every time while programming your board". Well, I want to do this for STM32F070CBT6. How can I do? Is there any example or document?

Thank you in advance.

Thank you for your answers. I achieved to program my board via Arduino. So, DFU related questions;
1) I don't want to use the boot pin every time I program my board. Is there a way to do this?
2) If I write my own bootloader, can I solve the above problem?
3) Can I modify the embedded bootloader ...

How can I enable the USB peripheral interface of the microcontroller? First, Do I need to program from UART etc. to enable USB?

Thanks for your reply. I am confused. You say I don't need to write bootloader. Is it correct? So what should I do to program my board from USB? What is your advise? Thanks in advance.

I have a board with STM32F070CBT6 as a microcontroller. I want to program this board from USB port (I will use the Arduino compiler for programming). So i need to write USB bootloader. Can you help me? Is there a suitable document or a written bootloader? Thank you in advance.