diff --git a/backend/socket/Dockerfile b/backend/socket/Dockerfile
new file mode 100644
index 00000000..fdd63436
--- /dev/null
+++ b/backend/socket/Dockerfile
@@ -0,0 +1,11 @@
+FROM node:16.18.1
+
+WORKDIR /app
+
+COPY yarn.lock package.json ./
+RUN yarn install
+
+COPY . .
+RUN yarn build
+
+CMD yarn start
\ No newline at end of file
diff --git a/backend/socket/src/room/room.gateway.ts b/backend/socket/src/room/room.gateway.ts
index 0a25929e..2be0cda6 100644
--- a/backend/socket/src/room/room.gateway.ts
+++ b/backend/socket/src/room/room.gateway.ts
@@ -66,7 +66,7 @@ export class RoomGateway implements OnGatewayConnection, OnGatewayDisconnect {
 
 	@SubscribeMessage(EVENT.END_INTERVIEW)
 	handleEndInterview(@ConnectedSocket() client: Socket) {
-		return this.interviewService.endInterview(client);
+		return this.interviewService.endInterview({ client, server: this.server });
 	}
 
 	@SubscribeMessage(EVENT.END_FEEDBACK)
diff --git a/backend/socket/src/room/service/interview/interview.service.ts b/backend/socket/src/room/service/interview/interview.service.ts
index 01e82887..b3a71390 100644
--- a/backend/socket/src/room/service/interview/interview.service.ts
+++ b/backend/socket/src/room/service/interview/interview.service.ts
@@ -38,7 +38,7 @@ export class InterviewService {
 		return {};
 	}
 
-	endInterview(client: Socket) {
+	endInterview({ client, server }: { client: Socket; server: Namespace }) {
 		const docsUUID = uuidv4();
 
 		const user = this.roomRepository.getUserByClientId(client.id);
@@ -52,7 +52,7 @@ export class InterviewService {
 			const clientId = this.roomRepository.getClientIdByUser(user.uuid);
 
 			const emitEvent = this.getEventAtEndInterviewByRole(user.role);
-			client.to(clientId).emit(emitEvent, { docsUUID });
+			server.to(clientId).emit(emitEvent, { docsUUID });
 		});
 
 		// TODO video object storage upload
diff --git a/backend/socket/src/room/service/webRTC/webrtc.service.ts b/backend/socket/src/room/service/webRTC/webrtc.service.ts
index 29435ea4..5be13925 100644
--- a/backend/socket/src/room/service/webRTC/webrtc.service.ts
+++ b/backend/socket/src/room/service/webRTC/webrtc.service.ts
@@ -40,6 +40,7 @@ export class WebrtcService {
 
 	disconnectWebrtc(client: Socket) {
 		const user = this.roomRepository.getUserByClientId(client.id);
+		if (!user) return;
 
 		client.to(user.roomUUID).emit(EVENT.DISCONNECT_WEBRTC, { userUUID: user.uuid });
 	}
diff --git a/frontend/package.json b/frontend/package.json
index f469e64c..d3ed19b0 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -30,7 +30,7 @@
   },
   "scripts": {
     "start": "craco start",
-    "build": "craco build",
+    "build": "CI=false && craco build",
     "test": "craco test",
     "eject": "react-scripts eject",
     "storybook": "start-storybook -p 6006 -s public",
diff --git a/frontend/src/pages/Lobby/Lobby.tsx b/frontend/src/pages/Lobby/Lobby.tsx
index bc516247..3de7f2f7 100644
--- a/frontend/src/pages/Lobby/Lobby.tsx
+++ b/frontend/src/pages/Lobby/Lobby.tsx
@@ -31,7 +31,6 @@ const Lobby = () => {
 	const streamList = useRecoilValue(webRTCStreamSelector);
 
 	useEffect(() => {
-		//TODO 변경된 부분 BE랑 맞추기
 		socket.on(SOCKET_EVENT_TYPE.JOIN_INTERVIEW, ({ user: interviewee }) => {
 			const newOthers = others.map((user) => {
 				return user.uuid === interviewee.uuid
@@ -61,12 +60,10 @@ const Lobby = () => {
 	}, [others]);
 
 	useEffect(() => {
-		//TODO Lobby 첫 렌더링 시가 아니라 첫 입장 시만 하기
-		startConnection(me.uuid);
+		if (!webRTCUserList.has(me.uuid)) startConnection(me.uuid);
 	}, []);
 
 	const handleStartInterviewee = async () => {
-		//TODO 변경된 부분 BE랑 맞추기
 		await socketEmit<joinInterviewResponseType>(SOCKET_EVENT_TYPE.START_INTERVIEW);
 
 		const newOthers = others.map((user) => {