chore: add casdoor

fixes #34

examples/casdoor/README.md

@@ -0,0 +1,12 @@
+# References
+
+- https://github.com/casdoor/casdoor
+- https://casdoor.org/pl/docs/basic/try-with-docker/
+
+# Notes
+
+You have to manually supply an `app.conf` configuration file.
+
+Within this file, you have to define your postgresql database connection string.
+
+An example `app.conf` is provided in this repository.