Ignore pipelines without config (#2949)

Co-authored-by: 6543 <6543@obermui.de>

server/api/helper.go

@@ -34,6 +34,8 @@ func handlePipelineErr(c *gin.Context, err error) {
 	} else if errors.Is(err, &pipeline.ErrBadRequest{}) {
 		c.String(http.StatusBadRequest, "%s", err)
 	} else if errors.Is(err, pipeline.ErrFiltered) {
+		// for debugging purpose we add a header
+		c.Writer.Header().Add("Pipeline-Filtered", "true")
 		c.Status(http.StatusNoContent)
 	} else {
 		_ = c.AbortWithError(http.StatusInternalServerError, err)