fix(.devcontainer.json): CGO_ENABLED string value to fix debug launch (#25)

Author: Jackson Tong

.devcontainer/devcontainer.json

@@ -60,7 +60,7 @@
         "go.lintOnSave": "package",
         "editor.formatOnSave": true,
         "go.toolsEnvVars": {
-            "CGO_ENABLED": 0
+            "CGO_ENABLED": "0"
         },
         "go.testEnvVars": {
             "": "",
@@ -74,4 +74,5 @@
         "go.coverOnSingleTestFile": true,
         "go.coverOnTestPackage": true
     }
-}
+}
+