Add initial dockerfile

Dockerfile

@@ -0,0 +1,16 @@
+FROM tsl0922/ttyd:latest
+
+RUN apt-get update && apt-get install --no-install-recommends -y \
+    git \
+    neovim \
+    zsh \
+    sudo
+
+RUN useradd -m -d /home/dev -s /usr/bin/zsh dev && adduser dev sudo
+RUN echo '%sudo ALL=(ALL) NOPASSWD:ALL' >> /etc/sudoers
+
+USER dev
+WORKDIR /home/dev
+
+ENTRYPOINT ["/usr/bin/tini", "--"]
+CMD ["ttyd", "-W", "bash"]