update readme

README.md

@@ -2,12 +2,20 @@
 
 This repository contains the code for the tool that is being developed as part of the Multiple Scales and Extreme Events (MSX) project.
 
-## How to access
-todo
+The tool that is presented in this repository is a simple web application, written in Dash (Plotly), that allows users to interactivaly create word clouds. The idea is that multiple users who work together in a team can do this together, and use the word clouds created by each participant to start/facilitate a discussion about the meaning of the terminology used within the team.
 
-## How to build
-todo
+## How to run locally
 
-## How to run
 To run the development server locally, execute `python scripts/run_debug_server.py`, and 
 in the browser navigate to http://127.0.0.1:8050/msx/
+
+## How to build for production
+
+This repository includes a Dockerfile that can be used for building a Docker image of the project. To build the image, run:
+
+`docker build --tag msx-image .`
+
+When running the container, take the following points into account:
+
+- The application runs on port 8000 inside the container, so you probably want to bind a port on your local machine to port 8000 in the container.
+- The application requires the environment variable `MSX_SECRET_KEY` to be set. Use a strong and secret key to set this variable. You can set an environment variable when starting the container with `docker run` with the `--env` option.