(misc) explicitly require nim>2 install with conda for the tutorial

Author: amkrajewski

.devcontainer/Dockerfile

@@ -1,8 +1,8 @@
 FROM continuumio/miniconda3
 
 RUN apt-get update \
-    && apt-get install -y gcc openssl \
-    && conda install -y -c conda-forge nim \
+    && apt-get install -y gcc \
+    && conda install -y -c conda-forge "nim>2" \
     && conda install -y -c conda-forge python=3.11 liblapack jupyter numpy pandas plotly \
     && nimble install -y arraymancer nimpy \
     && pip install pqam-rmsadtandoc2023 pathfinding igraph pycalphad==0.10.5