Specify `Accept-Encoding` for axios request (Fix #2253)

server/model/monitor.js

@@ -267,17 +267,22 @@ class Monitor extends BeanModel {
 
                     log.debug("monitor", `[${this.name}] Prepare Options for axios`);
 
+                    // Axios Options
                     const options = {
                         url: this.url,
                         method: (this.method || "get").toLowerCase(),
                         ...(this.body ? { data: JSON.parse(this.body) } : {}),
                         timeout: this.interval * 1000 * 0.8,
                         headers: {
+                            // Fix #2253
+                            // Read more: https://stackoverflow.com/questions/1759956/curl-error-18-transfer-closed-with-outstanding-read-data-remaining
+                            "Accept-Encoding": "gzip, deflate",
                             "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9",
                             "User-Agent": "Uptime-Kuma/" + version,
                             ...(this.headers ? JSON.parse(this.headers) : {}),
                             ...(basicAuthHeader),
                         },
+                        decompress: true,
                         maxRedirects: this.maxredirects,
                         validateStatus: (status) => {
                             return checkStatusCode(status, this.getAcceptedStatuscodes());