improv: attempt to be smart and detect hostname

nix-conf/system/configuration.nix

@@ -6,6 +6,7 @@ let
   _boot = specialArgs._boot or { };
   _services = specialArgs._services or { };
   includeHardware = specialArgs.includeHardware or true;
+  proj_root = builtins.toString ./../..;
 in
 with lib;
 {
@@ -36,7 +37,7 @@ with lib;
   };
   users.users.root = {
     # openssh runs in root, no? This is because port < 1024 requires root.
-    openssh.authorizedKeys.keys = lib.strings.splitString "\n" (builtins.readFile ../ssh/authorized_keys);
+    openssh.authorizedKeys.keys = lib.strings.splitString "\n" (builtins.readFile "${proj_root}/ssh/authorized_keys");
   };
 
   # Some basic programs

scripts/config-sysnix.sh

@@ -7,8 +7,12 @@ set -xv
 HOSTNAME=${1}
 
 if [ -z $HOSTNAME ]; then
-	echo "Missing hostname as first param" 1>&2
-	exit 1
+	current_hostname=$(hostname)
+	echo "Missing hostname as first param."
+	echo "Type the hostname you want to be here"
+	read -p "[${current_hostname}] > " HOSTNAME
+	HOSTNAME=${HOSTNAME:-${current_hostname}}
+	read -p "Using hostname: ${HOSTNAME}. Press ENTER to continue." _WHATEVER_
 fi
 
 # Where is this script located