So if I add 2 drives and connect this via ethernet, can it act as a server for a website that I own?

Theoretically yes. Check it's CPU capabilities and see if its strong enough.

I'm an old man with a question about a missing gpu? and only 2-core processor? back in my day, we used to have 4-core synology with a stylish gpu.

Just like any computer (and the one I have) 2 cores now are much faster than 4 cores in the past.

can i use a single drive (one bay) on 2 bay device? I want to start with one drive and then add second one later in few Weeks? does this device suppot

Yes you can start backing up your devices with one drive and add the second later. Of course there will be no redundancy (Raid) until the second drive is installed and setup.

ASIN	B0BRN9J1JN
Best Sellers Rank	#30,346 in Computers ( See Top 100 in Computers ) #19 in Network Attached Storage (NAS) Devices
Brand	Synology
Built-In Media	1 x DS723+ main unit, 1 x Quick Installation Guide, 1 x Accessory pack, 1 x AC power adapter, 1 x AC power cord, 2 x RJ-45 LAN cables
Color	black / black
Colour	black / black
Compatible Devices	Server
Compatible devices	Server
Customer Reviews	4.6 out of 5 stars 256 Reviews
EU Spare Part Availability Duration	3 Years
Enclosure Material	Metal
Is Assembly Required	Yes
Item Dimensions D x W x H	22.3D x 10.6W x 16.6H centimeters
Item Weight	1510 Grams
Manufacturer	Synology
Material	Metal
Mfr Part Number	DS723+
Model Number	DS723+
Mounting Type	Tabletop
Product dimensions	22.3D x 10.6W x 16.6H centimeters
Size	8.78 polegadas x 4.17 polegadas x 6.54 polegadas
UPC	846504004447
Warranty Description	2 Year warranty
Weight Capacity	Maximum weight: 755 g

Synology 2-Bay DiskStation DS723+ (Diskless)

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