judge: add process limit to setting

packages/hydrojudge/src/config.ts

@@ -19,6 +19,7 @@ let config = {
     sandbox_host: 'http://localhost:5050',
     testcases_max: 100,
     total_time_limit: 60,
+    processLimit: 32,
     parallelism: 2,
     rerun: 0,
     rate: 1,

packages/hydrojudge/src/sandbox.ts

@@ -27,7 +27,7 @@ function proc({
     execute = '',
     time = 16000,
     memory = parseMemoryMB(getConfig('memoryMax')),
-    process_limit = 32,
+    process_limit = getConfig('processLimit'),
     stdin = '', copyIn = {}, copyOut = [], copyOutCached = [],
 } = {}) {
     if (!supportOptional) {