Add caching

wsgi.py

@@ -2,10 +2,18 @@ import datetime
 
 import pandas as pd
 from flask import Flask, render_template, request
+from flask_caching import Cache
 
 from download_digital import construct_dataframe, get_bez_data
 
+config = {
+    "CACHE_TYPE": "SimpleCache",  # Flask-Caching related configs
+    "CACHE_DEFAULT_TIMEOUT": 300,
+}
+
 app = Flask(__name__)
+app.config.from_mapping(config)
+cache = Cache(app)
 
 
 def get_tables(url: str) -> tuple[pd.DataFrame, pd.DataFrame]:
@@ -25,6 +33,7 @@ def get_tables(url: str) -> tuple[pd.DataFrame, pd.DataFrame]:
 
 
 @app.route("/")
+@cache.cached(timeout=50)
 def tables(
     url: str = "https://beschaeftigtenbefragung.verdi.de/",
 ):