@EinEifnach bin ich bei der INstallation irgendwo falsch abgebogen?
Mein docker start sieht wie folgt aus:
```
# docker logs cassandra
2023-06-18 20:23:48 ERROR Backend: Could not read rovercfg.json. Missing datacfg.json
2023-06-18 20:23:48 DEBUG [Errno 2] No such file or directory: '/usr/src/cassandra/src/data/datacfg.json'
2023-06-18 20:23:48 DEBUG Found GEOS DLL: <CDLL '/usr/local/lib/python3.10/site-packages/Shapely.libs/libgeos_c-c8ec7514.so.1.16.1', handle 55b2b5346200 at 0x7f3920ee05b0>, using it.
2023-06-18 20:23:48 INFO Backend: Starting backend server
2023-06-18 20:23:48 DEBUG absolute_path: /usr/src/cassandra/src/backend
2023-06-18 20:23:48 INFO Backend: Read communication config file
2023-06-18 20:23:48 DEBUG Opening commcfg.json
2023-06-18 20:23:48 ERROR Backend: Failed to load communication config file. Missing file
2023-06-18 20:23:48 DEBUG [Errno 2] No such file or directory: '/usr/src/cassandra/src/data/datacfg.json'
2023-06-18 20:23:48 INFO Backend: Read map config file
2023-06-18 20:23:48 DEBUG Opening mapcfg.json
2023-06-18 20:23:48 ERROR Backend: Failed to load map config file. Missing file or invalid data.
2023-06-18 20:23:48 INFO Backend: Create mapcfg with default values: Mowoffset: 0.18; Mowangle: 0; Mowedge: Yes; Distance to border: 1; Pattern: lines
2023-06-18 20:23:48 INFO Backend: Positionmode: absolute, lon: 0.0, lat: 0.0
2023-06-18 20:23:48 DEBUG [Errno 2] No such file or directory: '/usr/src/cassandra/src/data/datacfg.json'
2023-06-18 20:23:48 DEBUG Values for mapcfg. mowoffset: 0.18 mowangle: 0 distance to border: 1 pattern: lines mowedge: yes
2023-06-18 20:23:48 INFO Backend: Read app config file
2023-06-18 20:23:48 DEBUG Opening appcfg.json
2023-06-18 20:23:48 ERROR Backend: Failed to load app config file. Missing file or invalid data.
2023-06-18 20:23:48 DEBUG [Errno 2] No such file or directory: '/usr/src/cassandra/src/data/datacfg.json'
2023-06-18 20:23:48 INFO Backend: Create appcfg with default values
2023-06-18 20:23:48 DEBUG Values for appcfg. datamaxage: 30 time until offline: 60 soc look up table: [{'V': 23.5, 'SoC': 0}, {'V': 28.0, 'SoC': 100}]
2023-06-18 20:23:48 INFO Backend: Read saved data
2023-06-18 20:23:48 WARNING Backend: Failed to load state data, create a default data frame
2023-06-18 20:23:48 WARNING Backend: Failed to load statistics data, create a default data frame
2023-06-18 20:23:48 WARNING Backend: Failed to load calced data from state, create a default data frame
2023-06-18 20:23:48 WARNING Backend: Failed to load calced data from stats, create a default data frame
2023-06-18 20:23:48 INFO Backend: Read map data file
2023-06-18 20:23:48 ERROR Backend: Could not read data from file. Missing tmp.json
2023-06-18 20:23:48 DEBUG [Errno 2] No such file or directory: '/usr/src/cassandra/src/data/map/tmp.json'
2023-06-18 20:23:48 ERROR Backend: Could not read perimeter from file. Missing datacfg.json
2023-06-18 20:23:48 DEBUG [Errno 2] No such file or directory: '/usr/src/cassandra/src/data/datacfg.json'
Traceback (most recent call last):
File "/usr/src/cassandra/app.py", line 77, in <module>
main()
File "/usr/src/cassandra/app.py", line 41, in main
backendserver.start()
File "/usr/src/cassandra/src/backend/backendserver.py", line 156, in start
if connect_data['USE'] == 'MQTT':
KeyError: 'USE'
```