adding Dockerfile and Readme

README.md

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+# DockerPythonFlask
+
+This is a dockerized version of a Python3 Flask Server.
+
+## Environment-variables
+
+There are no environment variables that get opened up.
+
+## Volumes
+
+Set the following volumes with the -v tag.
+
+| Volume-Name | Container mount | Description |
+| ----------- | --------------- | ----------- |
+| app		  | /flask/app		| directory for flask application |
+
+## Ports
+
+Set the following volumes with the -p tag.
+
+| Container-Port | Recommed outside port | Protocol | Description |
+| -------------- | --------------------- | -------- | ----------- |
+| 5000		     | 80		             | TCP      | HTTP port   |
+
+## Example run-command
+
+``` docker run --name flask -v flask:/flask/app --restart unless-stopped -d -p 80:5000 tiynger/pythonflask ```

src/Dockerfile

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+FROM ubuntu
+
+MAINTAINER TiynGER mail@martenkante.eu
+
+RUN apt-get update
+
+RUN apt-get install python3 python3-pip -y
+
+RUN pip3 install flask
+
+WORKDIR /flask
+
+VOLUME /flask
+
+EXPOSE 5000
+
+ENTRYPOINT [ "python3" ]
+
+CMD [ "app.py" ]