adding back install libgl1

Author: RemDelaporteMathurin

.devcontainer/Dockerfile

@@ -9,4 +9,4 @@ COPY environment.yml* /tmp/
 # Create the Conda environment as the vscode user
 RUN conda env create -f /tmp/environment.yml
 
-# RUN apt-get update && apt-get install -y libgl1
+RUN apt-get update && apt-get install -y libgl1