Set default concurrency to 10 and make timeout configurable

__tests__/config.test.ts

@@ -30,3 +30,19 @@ describe('isGhes', () => {
     expect(config.isGhes()).toBe(true)
   })
 })
+
+describe('uploadChunkTimeoutEnv', () => {
+  it('should return default 300000 when no env set', () => {
+    expect(config.getUploadChunkTimeout()).toBe(300000)
+  })
+  it('should return value set in ACTIONS_UPLOAD_TIMEOUT_MS', () => {
+    process.env.ACTIONS_UPLOAD_TIMEOUT_MS = '150000'
+    expect(config.getUploadChunkTimeout()).toBe(150000)
+  })
+  it('should throw if value set in ACTIONS_UPLOAD_TIMEOUT_MS is invalid', () => {
+    process.env.ACTIONS_UPLOAD_TIMEOUT_MS = 'abc'
+    expect(() => {
+      config.getUploadChunkTimeout()
+    }).toThrow()
+  })
+})