complete overhaul

Dockerfile

@@ -28,9 +28,10 @@ RUN apk add --no-cache ca-certificates tzdata wget
 COPY --from=builder /out/freemoto-web /app/web/freemoto-web
 COPY app/web/static/ /app/web/static/
 
-# Use non-root user
-RUN adduser -S -D -H -h /nonexistent appuser && \
-    chown -R appuser:appuser /app
+# Use non-root user (create group explicitly for Alpine)
+RUN addgroup -S appuser \
+    && adduser -S -D -H -h /nonexistent -G appuser appuser \
+    && chown -R appuser:appuser /app
 USER appuser
 
 ENV PORT=8080