Add env SECRET_KEY

.env.example

@@ -1,6 +1,11 @@
+# The URL of your mongodb database.
 DATABASE_URL=
+
+# Flask application
 PORT=8000
+SECRET_KEY=0a431f4a5f5851adfa37107a9035e6644c2b0124f9c3d1c1
 
+# Factorio username and token
 FACTORIO_USERNAME=
 FACTORIO_TOKEN=
 

app.py

@@ -1,3 +1,4 @@
+import os
 from flask import Flask, abort, request, jsonify
 from flasgger import Swagger
 import flask_monitoringdashboard as dashboard
@@ -9,6 +10,7 @@
 from version import __version__
 
 app = Flask(__name__)
+app.secret_key = os.getenv('SECRET_KEY', '')
 
 swagger_config = {
     "headers": [],