Use debian:bookworm-slim image for adc-sync job

Update dependency installation logic to support Debian, Alpine, and
RHEL/CentOS distributions. Add error handling for unsupported Linux
distributions.

helm/api7ee-demo-k8s/templates/job-adc-sync.yaml

@@ -42,8 +42,8 @@ spec:
       {{- end }}
       containers:
         - name: adc-sync
-          image: {{ .Values.api7.adc.image | default "ghcr.io/api7/adc:latest" }}
-          imagePullPolicy: {{ .Values.api7.adc.imagePullPolicy | default "IfNotPresent" }}
+          image: debian:bookworm-slim
+          imagePullPolicy: IfNotPresent
           command:
             - /bin/sh
             - -c
@@ -53,12 +53,18 @@ spec:
 
               # Install dependencies and ADC binary
               echo "Installing curl and dependencies..."
-              if command -v apk &> /dev/null; then
-                apk add --no-cache curl {{- if .Values.api7.autoPublish }} jq{{- end }}
-              elif command -v apt-get &> /dev/null; then
+              if [ -f /etc/debian_version ]; then
+                # Debian/Ubuntu
                 apt-get update && apt-get install -y curl {{- if .Values.api7.autoPublish }} jq{{- end }}
-              elif command -v yum &> /dev/null; then
+              elif [ -f /etc/alpine-release ]; then
+                # Alpine
+                apk add --no-cache curl {{- if .Values.api7.autoPublish }} jq{{- end }}
+              elif [ -f /etc/redhat-release ]; then
+                # RHEL/CentOS
                 yum install -y curl {{- if .Values.api7.autoPublish }} jq{{- end }}
+              else
+                echo "ERROR: Unsupported Linux distribution"
+                exit 1
               fi
 
               # Download and install ADC binary