I’m almost sure that ./ is the directory of the compose.yaml.
Normally I just run docker compose up -d in the project directory, but I could run docker compose up -d -f /somewhere/compose.yaml from another directory, and then the ./ would be /somewhere, and not the directory where I started the command.
There are also some SAT receivers that run Linux, see e.g. https://www.opena.tv/app.php/atv_images
Yes. Or 100W.
0.1kWh per hour can be written as 0.1kWh/h, which is the same as 0.1kW.
Do you mean 0.1kWh per hour, so 0.1kW or 100W?
My N100 server needs about 11W.
This. OP, get an M.2 NVME SSD in 2280 or 2260 size. Then you can add a SATA drive later, when/if you need it.
Keepass2Android can use an sftp server. If something was changed on the desktop, Keepass2Android will ask if it should merge the changes.