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Update part2.md (#3183)

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Michel Ruffieux 2017-05-09 18:25:12 +02:00 committed by Joao Fernandes
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get-started/part2.md
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@ -129,7 +129,7 @@ if __name__ == "__main__":
app.run(host='0.0.0.0', port=80)
```
Now we see that `pip install requirements.txt` installs the Flask and Redis
Now we see that `pip install -r requirements.txt` installs the Flask and Redis
libraries for Python, and the app prints the environment variable `NAME`, as
well as the output of a call to `socket.gethostname()`. Finally, because Redis
isn't running (as we've only installed the Python library, and not Redis