Add 'README.md'

README.md

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+# Face Mask Detection
+
+1. Clone repository
+2. Download dataset from: https://www.kaggle.com/andrewmvd/face-mask-detection
+3. In the project create folder 'data'
+4. Put 'annotations' and 'images' folders into 'data' folder
+5. You can now run project (it uses saved model 'face_mask_detection2.hp') or you can train model yoursel and to do that:
+- execute jupyter notebook 'data_preprocessing.ipynb' - data preprocessing
+- execute jupyter notebook 'train_model.ipynb' - it will overwrite face_mask_detection2.hp' file
+- run project
+
+
+To run project:
+
+```
+pip3 install virtualenv
+virtualenv venv
+source venv/bin/activate
+python3 -m pip install -r requirements.txt
+python3 detect_mask.py 
+```