Move all check- scripts to /entrypoint.d/ for better organization

install/production-filesystem/entrypoint.d/15-first-run-config.sh

@@ -0,0 +1,26 @@
+#!/bin/sh
+# first-run-check.sh - Checks and initializes configuration files on first run
+
+# Check for app.conf and deploy if required
+if [ ! -f ${NETALERTX_CONFIG}/app.conf ]; then
+    mkdir -p "${NETALERTX_CONFIG}" || {
+        >&2 echo "ERROR: Failed to create config directory ${NETALERTX_CONFIG}"
+        exit 1
+    }
+    cp /app/back/app.conf "${NETALERTX_CONFIG}/app.conf" || {
+        >&2 echo "ERROR: Failed to copy default config to ${NETALERTX_CONFIG}/app.conf"
+        exit 2
+    }
+    RESET='\033[0m'
+    >&2 cat <<EOF
+══════════════════════════════════════════════════════════════════════════════
+🆕  First run detected. Default configuration written to ${NETALERTX_CONFIG}/app.conf.
+
+    Review your settings in the UI or edit the file directly before trusting
+    this instance in production.
+══════════════════════════════════════════════════════════════════════════════
+EOF
+
+	>&2 printf "%s" "${RESET}"
+fi
+