Update /lab and /repl links in the README

Author: juntyr

README.md

@@ -2,7 +2,7 @@
 
 Welcome to the **Online Laboratory for Climate Science and Meteorology**!
 
-If you are familiar with [JupyterLab](https://jupyter.org/), you should feel right at home with the user interface of this lab. You can use the JupyterLab interface at [/lab](/lab) and a REPL interface at [/repl](/repl).
+If you are familiar with [JupyterLab](https://jupyter.org/), you should feel right at home with the user interface of this lab. You can use the JupyterLab interface at [/lab](https://lab.climet.eu/latest/lab) and a REPL interface at [/repl](https://lab.climet.eu/latest/repl).
 
 In fact, this laboratory is built using [JupyterLite](https://jupyterlite.readthedocs.io/en/stable/), "a JupyterLab distribution that runs entirely in [your] browser" by leveraging WebAssembly. In other words, while you typically need to install JupyterLab on your own machine or connect to a server that executes your code, JupyterLite runs installation-free in your webbrowser and allows your code, data, and information to stay entirely on your machine. To run Python code within your browser, JupyterLite uses [Pyodide](https://pyodide.org/en/stable/), "a Python distribution for the browser [...] based on WebAssembly".