Ok, so what features should board like this have? 

• Camera module - without it, it would be just another ESP32 board 
• SD card - for storing images
• OLED display - for all sorts of informations
• RGB LEDs - for lightning
• Light senor - we need to know, if we need to fire up lights  
• 2nd UART - for communication with some other devices
• USB programming - for easy development

My main concern was, if I will find enough resources to put all parts together. I already designed some parts on another boards (SD card, UART, RGB leds) but camera & OLED circuits was unknown for me. Big recourse for all of my boards is Adafruit library with all of their great boards and because of that, I found their OLED brakeout board. So basically i just copied schematic for OLED display, change it to use just I2C, and that was all. Also SparkFun have very nice library of boards, so I used their design for light sensor.   

Biggest problem was with connection of the camera. I found some schematics on Google and I made my connections based on them and just when I finished my routing of the board, I did find schematic for SeedStudio board also for M5Stack board, but I decided to keep my setup and did not change my routing. 

This is how my board looks like:

Here are screenshots from Manufacturing tab in Eagle: 

Here is 3D visualisation from Fusion 360:

Board is ready for production :-) .