Merge branch 'master' into fix/install-requirements-on-startup

Author: madnificent

README.md

@@ -325,6 +325,10 @@ Since this template is based on the meinheld-gunicorn-docker image, all possible
 For hosting the app in a production setting, the template depends on [meinheld-gunicorn-docker](https://github.com/tiangolo/meinheld-gunicorn-docker). All [environment variables](https://github.com/tiangolo/meinheld-gunicorn-docker#environment-variables) used by meinheld-gunicorn can be used to configure your service as well.
 
 ## Other
+
+### Reassigning `app`
+In regular Flask applications (e.g. those not run within this template) you are required to define `app` by using `app = Flask(__name__)` or similar. This does *not* need to be done in your web.py, as this is handled by the microservice architecture/template. Redefining this may cause `The requested URL was not found on the server. If you entered the URL manually please check your spelling and try again.` to be thrown on your routes, which can be luckily be fixed by simply removing the previously mentioned `app = ...` line.
+
 ### readme.py
 To simplify documenting the helper functions, `README.py` can be used to import & render the docstrings into README.md.
 Usage:
@@ -333,4 +337,3 @@ python3 -m pip install pydoc-markdown
 python3 README.py
 ```
 You can customise the output through the API configuration! See [README.py](README.py) && the [pydoc-markdown docs](https://niklasrosenstein.github.io/pydoc-markdown/).
-