diff --git a/Dockerfile b/Dockerfile
index c4484b4..3c5e4a0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,19 +1,21 @@
 FROM debian:trixie
 
 RUN apt-get update && apt-get install -y \
-    git \
-    neovim \
-    man-db \
-    openssh-client \
-    passwd \
-    gcc \
-    ripgrep \
-    wl-clipboard \
-    tmux \
-    curl \
-    python3-pip \
-    python3-venv \
-    nodejs
+  locales \
+  git \
+  neovim \
+  man-db \
+  openssh-client \
+  passwd \
+  gcc \
+  ripgrep \
+  wl-clipboard \
+  tmux \
+  curl \
+  python3-pip \
+  python3-venv
+
+RUN locale-gen ko_KR.UTF-8
 
 ARG UID
 ARG GID
@@ -27,10 +29,10 @@ ENV CONFIG_PREFIX=${CONFIG_PREFIX:-personal}
 ENV TERM=xterm-256color
 
 RUN set -eux; \
-    groupadd -g "$GID" "$USERNAME"; \
-    useradd -m -u "$UID" -g "$USERNAME" -s /bin/bash "$USERNAME"; \
-    mkdir -p /workspace; \
-    chown "$USERNAME:$USERNAME" /workspace
+  groupadd -g "$GID" "$USERNAME"; \
+  useradd -m -u "$UID" -g "$USERNAME" -s /bin/bash "$USERNAME"; \
+  mkdir -p /workspace; \
+  chown "$USERNAME:$USERNAME" /workspace
 
 WORKDIR /workspace
 
@@ -38,8 +40,16 @@ ENV HOME=/home/${USERNAME}
 
 USER ${USERNAME}
 
-RUN python3 -m venv $HOME/py && $HOME/py/bin/pip install pyright
-RUN echo "export PATH=\"$HOME/py/bin:$PATH\"" >> $HOME/.bashrc
+RUN python3 -m venv $HOME/py \
+  && $HOME/py/bin/pip install pyright \
+  && echo "export PATH=\"$HOME/py/bin:$PATH\"" >> $HOME/.bashrc
+
+ENV NVM_DIR=${HOME}/.nvm
+
+RUN curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.40.1/install.sh | bash \
+    && . $NVM_DIR/nvm.sh \
+    && nvm install --lts \
+    && npm install -g typescript-language-server
 
 COPY --chown=${USERNAME}:${GID} ${CONFIG_PREFIX}.gitconfig /home/${USERNAME}/.gitconfig
 
@@ -47,5 +57,7 @@ COPY --chown=${USERNAME}:${GID} .config/nvim /home/${USERNAME}/.config/nvim
 
 COPY --chown=${USERNAME}:${GID} .tmux.conf /home/${USERNAME}/.tmux.conf
 
+RUN locale-gen ko_KR.UTF-8 && echo 'export LANG=ko_KR.UTF-8' >> ~/.bashrc
+
 CMD ["/bin/bash"]