Add webfonts

app/app.py

@@ -187,6 +187,14 @@ def get_robots():
     return send_file('static/robots.txt')
 
 
+@app.route('/fonts/<filename>', methods=['GET'])
+def get_font(filename):
+    if not re.fullmatch(r'[a-zA-Z0-9][a-zA-Z0-9._-]*\.(?:otf|svg|woff2?)', filename):
+        return abort(404)
+
+    return send_file('static/fonts/' + filename)
+
+
 @app.route('/quotes.css', methods=['GET'])
 def get_quote_css():
     return send_file('static/quotes.css')

app/static/quotes.css

@@ -1,6 +1,20 @@
 @font-face {
   font-family: "Fira Sans";
-  src: local("Fira Sans"), local("Fira Sans Regular"), url(FiraSans-Regular.otf);
+  font-weight: normal;
+  src: local("Fira Sans"), local("Fira Sans Regular"),
+    url(/fonts/FiraSans-Regular.otf) format("opentype"),
+    url(/fonts/FiraSans-Regular.woff2) format("woff2"),
+    url(/fonts/FiraSans-Regular.woff) format("woff"),
+    url(/fonts/FiraSans-Regular.svg) format("svg");
+}
+@font-face {
+  font-family: "Fira Sans";
+  font-weight: bold;
+  src: local("Fira Sans"), local("Fira Sans Bold"),
+    url(/fonts/FiraSans-Bold.otf) format("opentype"),
+    url(/fonts/FiraSans-Bold.woff2) format("woff2"),
+    url(/fonts/FiraSans-Bold.woff) format("woff"),
+    url(/fonts/FiraSans-Bold.svg) format("svg");
 }
 
 body {