add a basic app

.editorconfig

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+# top-most EditorConfig file
+root = true
+
+# Unix-style newlines with a newline ending every file
+[*]
+end_of_line = lf
+insert_final_newline = true
+
+# Matches multiple files with brace expansion notation
+# Set default charset
+[*.{js,py}]
+charset = utf-8
+
+# 4 space indentation
+[*.py]
+indent_style = space
+indent_size = 4
+
+# Tab indentation (no size specified)
+[Makefile]
+indent_style = tab
+
+# Indentation override for all JS under lib directory
+[lib/**.js]
+indent_style = space
+indent_size = 2
+
+# Matches the exact files either package.json or .travis.yml
+[{package.json,.travis.yml}]
+indent_style = space
+indent_size = 2

app.py

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+from flask import Flask, request, Response
+app = Flask(__name__)
+
+
+@app.route('/overflow', methods=['post'])
+def overflow():
+    '''
+    Example:
+        /overflow hello world
+    '''
+    user_id = request.values.get('user_id')
+    user_name = request.values.get('user_name')
+    channel_name = request.values.get('channel_name')
+    text = request.values.get('text')
+
+    return Response(text, content_type='text/plain; charset=utf-8')
+
+
+@app.route('/')
+def hello():
+    return 'Hello World!'
+
+
+if __name__ == '__main__':
+    app.run(debug=True)

requirements.txt

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+flask==0.10.1
+py-stackexchange==2.2.004