Load defaults from example config

This makes some options non-optional -- allowing for a smaller config file.
This also removes the X-Sendfile example, bucause the proxy server should
handle static files directly and the option is not at all specific to this
particular application (and general Flask options aren't documented).

README.md

@@ -75,8 +75,8 @@ Setting up the server
 		# # OR:
 		# pip install uwsgi
 
-  4. Configure the server by changing options in config.py, which is a Flask
-	configuration file.
+  4. Configure the server by adding options to `config.py`.
+       See `config-example.py` for defaults.
 
   5. Start the server:
 

config-example.py

@@ -1,16 +1,12 @@
 
 # Enables detailed tracebacks and an interactive Python console on errors.
 # Never use in production!
-#DEBUG = True
+DEBUG = False
 
 # Address for development server to listen on
-#HOST = "127.0.0.1"
+HOST = "127.0.0.1"
 # Port for development server to listen on
-#PORT = 5000
-
-# Makes the server more performant at sending static files when the
-# server is being proxied by a server that supports X-Sendfile.
-#USE_X_SENDFILE = True
+PORT = 5000
 
 # File to store the JSON server list data in.
 FILENAME = "list.json"

server.py

@@ -10,7 +10,11 @@ sched = BackgroundScheduler(timezone="UTC")
 sched.start()
 
 app = Flask(__name__, static_url_path = "")
-app.config.from_pyfile("config.py")
+
+# Load configuration
+app.config.from_pyfile("config-example.py")  # Use example for defaults
+if os.path.isfile(os.path.join(app.root_path, "config.py")):
+        app.config.from_pyfile("config.py")
 
 
 @app.route("/")