更新DevContainer设置，将Proxy设置为：http://host.docker.internal:7890

Author: fred-meng

.devcontainer/devcontainer.json

@@ -16,10 +16,10 @@
 		}
 	},
 	"containerEnv": {
-    	"HTTP_PROXY": "${localEnv:HTTP_PROXY}",
-    	"HTTPS_PROXY": "${localEnv:HTTP_PROXY}",
-    	"http_proxy": "${localEnv:HTTP_PROXY}",
-    	"https_proxy": "${localEnv:HTTP_PROXY}"
+    	"HTTP_PROXY": "http://host.docker.internal:7890",
+    	"HTTPS_PROXY": "http://host.docker.internal:7890",
+    	"http_proxy": "http://host.docker.internal:7890",
+    	"https_proxy": "http://host.docker.internal:7890"
   	},
 
 	// Features to add to the dev container. More info: https://containers.dev/features.