Re-add docker files

Author: aashishpanta0

hands-on/session III/Dockerfile

@@ -0,0 +1,23 @@
+FROM --platform=linux/amd64 continuumio/miniconda3:23.10.0-1
+
+RUN mkdir app
+WORKDIR /app
+
+
+COPY *.ipynb /app/
+COPY environment.yml /app/
+
+# Install base utilities
+RUN apt-get update \
+    && apt-get install -y build-essential \
+    && apt-get install -y wget \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+RUN conda env create -f environment.yml
+SHELL ["conda", "run", "-n", "NSDF-Tutorial", "/bin/bash", "-c"]
+
+RUN pip install openvisus
+RUN conda init

hands-on/session III/environment.yml

@@ -0,0 +1,10 @@
+name: NSDF-Tutorial
+channels:
+  - conda-forge
+  - defaults
+dependencies:
+  - python=3.10
+  - pip
+  - pip:
+    - numpy
+    - matplotlib