++ fix: update .env.example and README.md, add CreateInitialAdmin command, update docker-compose.yml and entrypoint.sh, remove old CSS file and update manifest.json

docker/php/entrypoint.sh

@@ -176,6 +176,21 @@ else
     echo "[i] RUN_DB_SEED_ON_FIRST_START=false, skipping automatic seed."
 fi
 
+# -----------------------------------------------
+# 7c. Ensure initial admin exists (first startup)
+# -----------------------------------------------
+ENSURE_INITIAL_ADMIN_ON_EMPTY_DB="${ENSURE_INITIAL_ADMIN_ON_EMPTY_DB:-true}"
+
+if [ "$ENSURE_INITIAL_ADMIN_ON_EMPTY_DB" = "true" ]; then
+    echo "[*] Ensuring initial administrator account..."
+    if ! php artisan app:create-initial-admin --from-env --no-interaction; then
+        warn "Initial admin creation failed. Set INITIAL_ADMIN_NAME, INITIAL_ADMIN_EMAIL and INITIAL_ADMIN_PASSWORD."
+        exit 1
+    fi
+else
+    echo "[i] ENSURE_INITIAL_ADMIN_ON_EMPTY_DB=false, skipping initial admin creation check."
+fi
+
 # -----------------------------------------------
 # 8. Cache config/routes/views
 # -----------------------------------------------