Add basic Flask and related files

Procfile

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+web: gunicorn app:app --log-file=-

app.py

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+from flask import Flask
+from datetime import datetime
+app = Flask(__name__)
+
+@app.route('/')
+def homepage():
+    the_time = datetime.now().strftime("%A, %d %b %Y %l:%M %p")
+
+    return """
+    <h1>Hello heroku</h1>
+    <p>It is currently {time}.</p>
+
+    <img src="http://loremflickr.com/600/400">
+    """.format(time=the_time)
+
+if __name__ == '__main__':
+    app.run(debug=True, use_reloader=True)

requirements.txt

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+Flask
+gunicorn

runtime.txt

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+python-3.6.8