Add an ability to enable/disable nscd (#3652)

server/client.js

@@ -147,15 +147,18 @@ async function sendAPIKeyList(socket) {
 async function sendInfo(socket, hideVersion = false) {
     let version;
     let latestVersion;
+    let isContainer;
 
     if (!hideVersion) {
         version = checkVersion.version;
         latestVersion = checkVersion.latestVersion;
+        isContainer = (process.env.UPTIME_KUMA_IS_CONTAINER === "1");
     }
 
     socket.emit("info", {
         version,
         latestVersion,
+        isContainer,
         primaryBaseURL: await setting("primaryBaseURL"),
         serverTimezone: await server.getTimezone(),
         serverTimezoneOffset: server.getTimezoneOffset(),