Added Docker configuration

Dockerfile

@@ -2,15 +2,17 @@ FROM ubuntu:20.04
 
 MAINTAINER Abel Fokkinga "abel@fokkinga.com"
 
-RUN apt-get update -y && \
-    apt-get install -y python-pip python-dev
+RUN apt-get update && apt-get upgrade -y && apt-get autoremove && apt-get autoclean
+RUN apt install git python3 python3-pip -y --no-install-recommends
+RUN apt install locales -y --no-install-recommends
+RUN locale-gen en_US.UTF-8
 
 WORKDIR /app
 
-RUN pip install flask, requests, wtforms, json
+RUN pip install flask requests wtforms 
 
 COPY . /app
 
-ENTRYPOINT [ "python" ]
+ENTRYPOINT [ "python3" ]
 
 CMD [ "main.py" ]