README: Add package names for common distros and what Nix is

Closes: #259

Signed-off-by: Felix Walter <felix.walter@d3tn.com>

README.md

@@ -34,9 +34,21 @@ The build process and runtime options of µD3TN are outlined on a dedicated [**d
 
 **Dependencies:**
 
+- Git
 - GNU `make`, `gcc`, `binutils`
 - the `sqlite` and `jansson` development packages
 
+Examples for common distributions:
+
+```sh
+# Debian / Ubuntu
+[sudo] apt install git build-essential libsqlite3-dev libjansson-dev
+# Fedora
+[sudo] dnf install git make gcc sqlite-devel jansson-devel
+# Arch Linux / Manjaro
+[sudo] pacman -Sy git base-devel sqlite jansson
+```
+
 **Obtain the code:**
 
 ```sh
@@ -67,6 +79,9 @@ make posix type=release optimize=yes
 
 **Build with [Nix](https://nixos.wiki/wiki/Nix_package_manager):**
 
+Alternatively to installing everything manually, **Nix** can be used, which automatically takes care
+of providing the correct (pinned) dependencies and a working development environment.
+
 ```sh
 nix --experimental-features 'nix-command flakes' build '.?submodules=1#ud3tn'
 ```