Added python env installation instructions.

README.md

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+## Installation
+
+Open a terminal or Anaconda Prompt with access to `conda', and follow these steps to set up the environment for the Flagging App:
+
+1. **Update Conda:**  
+   `conda update conda --yes`
+
+2. **Create a New Conda Environment:**  
+   `conda create -n flaggingapp_env python=3.10 jupyter h5py numpy pandas scipy pyyaml plotly dash --yes`
+
+3. **Activate the Environment:**  
+   `conda activate flaggingapp_env`
+
+4. **Install Jupyter Kernel:**  
+   `python -m ipykernel install --user --name flaggingapp_env --display-name "Python (flaggingapp_env)"`
+
+5. **Install Additional Package:**  
+   `pip install igor2`