Those Raspberry Pi's are awesome! Since I messed a little with NGINX on a Linux VM, I decided to put all that on the Raspberry with the DietPi OS… and it just works.
It was actually very easy to do, much more so than initially configuring that nasty NGINX. Hosting several apps in the same domain (localhost for me) is a real pain, Apache is much easier for that.
So now, this little guy can be plugged into the network and be used as a nice wiki to take notes, that's very handy.
I used dokuwiki which doesn't need any database server, it's easy and has many useful features. I had tried to find a good editor to keep notes on different subjects (configuration info and general tips, things to remember and so on), but hadn't found anything satisfactory, this does it and it can be accessed from any device.
I was expecting a lot of differences with Linux, like busybox, a custom service system, hard-to-install software and all that. But no, it has the GNU commands, systemd and software can be installed with apt (which is slow, I suspect their ARM repository doesn't have servers as powerful as other distros - maybe they run on Raspberries too, hehe) or their own text-based UI.
In conclusion, I haven't tried the default Raspbian to compare, but
DietPi seems pretty good to me. I'll see how it copes with updates and stability after a while.
PS: I just hope the heat sink is enough when it's used more intensively...