Add support for Docker

Author: veetimar

Dockerfile

@@ -0,0 +1,9 @@
+FROM python
+
+RUN pip install numpy matplotlib
+
+WORKDIR /usr/src/app
+
+COPY . .
+
+CMD ["python", "src/digits.py"]

README.md

@@ -2,10 +2,29 @@
 [![codecov](https://codecov.io/gh/veetimar/neural-network-python/graph/badge.svg?token=B3NIJQEDA6)](https://codecov.io/gh/veetimar/neural-network-python)
 
 ## About
+
 A fully connected neural network, ELU activation in hidden layers and sigmoid in output layer.
 Comes with a simple user interface for training and testing the neural net with MNIST hand-written digits but can be used for practically any task since the size of the neural net and batch size can be freely choosed. Is able to achieve over 97% accuracy in the MNIST dataset with just a few minutes of training.
+
 ## How to use
-Clone the repository and install the required dependencies with:
+
+### The easy way (Docker installed)
+
+```console
+docker run -it veetimar/neural-network
+```
+
+Note that matplotlib seems not to work inside a container so plotting error after training and showing images classified wrong/right do not work when using Docker.
+
+### The hard way (Poetry and Python installed)
+
+Clone the repository
+
+```console
+git clone https://github.com/veetimar/neural-network-python
+```
+
+Install the required dependencies with
 
 ```console
 poetry install --without dev