Bind port to all interfaces

Dockerfile

@@ -16,4 +16,4 @@ ENV DATABASE_PASSWORD secret
 ENV DATABASE_NAME db
 ENV DATABASE_HOST postgresql
 
-CMD [ "flask", "run" ]
+CMD [ "python3", "app.py" ]

app.py

@@ -36,4 +36,4 @@ def initialize_database():
     init_db()
 
 if __name__ == '__main__':
-    app.run()
+    app.run(host="0.0.0.0")