Fix not using correct environment variables

pipeline_executor/pipeline_executor.go

@@ -216,11 +216,7 @@ func ExecutePipeline(pe PipelineExecution, db database.Database, pipelineConf co
 		&container.Config{
 			Image: imageName,
 			Tty:   false,
-			Env: []string{
-				fmt.Sprintf("RUNID=%v", pe.Run.Id),
-				"CURSORIUS_SRC_DIR=/cursorius/src",
-				fmt.Sprintf("CUROSRIUS_SERVER_URL=%v", pipelineConf.AccessURL),
-			},
+			Env:   env,
 		},
 		// TODO: fix running the runner in docker (add VolumesFrom to HostConfig)
 		&hostConfig,