diff --git a/Dockerfiles/yoctools.dockerfile b/Dockerfiles/yoctools.dockerfile
index 2df751a..3d8fe9e 100644
--- a/Dockerfiles/yoctools.dockerfile
+++ b/Dockerfiles/yoctools.dockerfile
@@ -5,7 +5,12 @@ ENV DEBIAN_FRONTEND=noninteractive
 RUN sed -i "s@http://.*archive.ubuntu.com@http://mirrors.tuna.tsinghua.edu.cn@g" /etc/apt/sources.list \
     && sed -i "s@http://.*security.ubuntu.com@http://mirrors.tuna.tsinghua.edu.cn@g" /etc/apt/sources.list \
     && apt update \
-    && apt install -y git lz4 unzip python3-pip
+    && apt install -y curl git lz4 unzip python3-pip \
+    && curl -fsSL https://deb.nodesource.com/setup_lts.x | bash - \
+    && apt update \
+    && apt install -y nodejs \
+    && apt clean \
+    && rm -fr /var/lib/apt/lists/* /tmp/* /var/tmp/*
 
 RUN pip3 install yoctools pyyaml && cd /usr/bin && ln -s python3 python
  
diff --git a/WebApplication/model/BlogSession.cpp b/WebApplication/model/BlogSession.cpp
index 4b413a5..6803468 100644
--- a/WebApplication/model/BlogSession.cpp
+++ b/WebApplication/model/BlogSession.cpp
@@ -1,11 +1,11 @@
 #include "BlogSession.h"
 #include <Wt/Auth/AuthService.h>
+#include <Wt/Auth/GoogleService.h>
 #include <Wt/Auth/HashFunction.h>
 #include <Wt/Auth/PasswordService.h>
-#include <Wt/Dbo/FixedSqlConnectionPool.h>
-#include <Wt/Auth/PasswordVerifier.h>
 #include <Wt/Auth/PasswordStrengthValidator.h>
-#include <Wt/Auth/GoogleService.h>
+#include <Wt/Auth/PasswordVerifier.h>
+#include <Wt/Dbo/FixedSqlConnectionPool.h>
 
 class BlogOAuth : public std::vector<const Wt::Auth::OAuthService *> {
 public:
@@ -57,6 +57,10 @@ Wt::Dbo::ptr<User> BlogSession::user() const {
         return Wt::Dbo::ptr<User>();
 }
 
+Wt::Signal<Wt::Dbo::ptr<Comment>> &BlogSession::commentsChanged() {
+    return m_commentsChanged;
+}
+
 Wt::Auth::PasswordService *BlogSession::passwordAuth() const {
     return &blogPasswords;
 }
diff --git a/WebApplication/model/BlogSession.h b/WebApplication/model/BlogSession.h
index 084c279..39ec755 100644
--- a/WebApplication/model/BlogSession.h
+++ b/WebApplication/model/BlogSession.h
@@ -19,9 +19,7 @@ public:
         return m_login;
     }
     Wt::Dbo::ptr<User> user() const;
-    Wt::Signal<Wt::Dbo::ptr<Comment>> &commentsChanged() {
-        return commentsChanged_;
-    }
+    Wt::Signal<Wt::Dbo::ptr<Comment>> &commentsChanged();
     BlogUserDatabase &users() {
         return m_users;
     }
@@ -32,6 +30,6 @@ private:
     Wt::Dbo::SqlConnectionPool &m_connectionPool;
     BlogUserDatabase m_users;
     Wt::Auth::Login m_login;
-    Wt::Signal<Wt::Dbo::ptr<Comment>> commentsChanged_;
+    Wt::Signal<Wt::Dbo::ptr<Comment>> m_commentsChanged;
 };
 #endif // __BLOGSESSION_H__
\ No newline at end of file