Update Dockerfile

Dockerfile

@@ -46,7 +46,7 @@ RUN mkdir -p /home/coder/.local/share/code-server/User
 # Add settings.json to enable dark mode
 RUN echo '{ \
    "workbench.colorTheme": "Default Dark Modern"
-}' > /home/coder/.local/share/code-server/User/settings.json
+  }' > /home/coder/.local/share/code-server/User/settings.json
 
 # Install Python extension for code-server