Clean up duplicate packages and unused workflow env

Remove duplicate apt packages in the base install list, drop an unused
workflow-level TAG_NAME env var, and trim minor whitespace so the build
configuration stays lean and easier to maintain.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: root

.github/workflows/deploy-warewulf-rke2-hami.yml

@@ -67,9 +67,6 @@ on:
 permissions:
   contents: write
 
-env:
-  TAG_NAME: ${{ github.ref_name }}
-
 jobs:
   build-and-push:
     name: Build & Push RKE2-HAMi Node Image

dockerfile

@@ -73,7 +73,6 @@ RUN apt-get update && apt-get install -y \
     jq \
     git \
     iputils-ping \
-    gnupg \
     lsb-release \
     bash-completion \
     bpfcc-tools \
@@ -84,7 +83,6 @@ RUN apt-get update && apt-get install -y \
     gnupg-agent \
     ignition \
     gdisk \
-    systemd \
     rsyslog \
     logrotate \
     systemd-journal-remote \
@@ -314,7 +312,7 @@ RUN if [ "$FIRSTBOOT_ENABLED" = "true" ]; then \
 ENV PATH="/var/lib/rancher/rke2/bin:${PATH}"
 
 RUN mkdir -p /etc/systemd/system && \
-    mkdir -p /etc/rancher/rke2/ 
+    mkdir -p /etc/rancher/rke2/
 
 # --- Ensure runtime dirs exist on boot ---
 # On Warewulf nodes /var/log is frequently tmpfs, so anything chowned/chmodded