Rename installer.key to keyfile

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

hosts/common/configs/system/nix-install/install.sh

@@ -51,7 +51,7 @@ check_key() {
 set_password_file() {
   SOPS_AGE_KEY_FILE="$flake/secrets/$key/key.txt"
   export SOPS_AGE_KEY_FILE
-  sops --decrypt --extract "['luks']" "$flake/hosts/$host/secrets/secrets.yaml" > /tmp/installer.key
+  sops --decrypt --extract "['luks']" "$flake/hosts/$host/secrets/secrets.yaml" > /tmp/keyfile
   unset SOPS_AGE_KEY_FILE
 }
 
@@ -104,7 +104,7 @@ finish() {
 }
 
 cleanup() {
-  rm -f /tmp/installer.key
+  rm -f /tmp/keyfile
   if [[ -n "$host" ]]; then disko -m "unmount" "$flake/hosts/$host/format.nix"; fi
   if [[ -d "$root" ]]; then rmdir "$root"; fi
 }