Install on Synology Docker

[CH68]

Works great on windows but I am struggling to get this working on Synology/Docker.
Pretty sure I've not got the environment/paths/permissions right but get 'Failed to fetch' / 'ERR_OPENING_MEDIA' errors when opening Stremio with the RD token.

Server is running:
{"config": "{\"bindAddr\":\"0.0.0.0\",\"port\":9191,\"baseURL\":\"http://192.168.1.2:9191\",\"storagePath\":\"\",\"maxAgeTorrents\":604800000000000,\"cachePath\":\"/.cache/deflix-stremio/cache\",\"cacheAgeXD\":86400000000000,\"redisAddr\":\"\",\"redisCreds\":\"\",\"baseURLyts\":\"https://yts.mx\",\"baseURLtpb\":\"https://apibay.org\",\"baseURL1337x\":\"https://1337x.to\",\"baseURLibit\":\"https://ibit.am\",\"baseURLrarbg\":\"https://torrentapi.org\",\"baseURLrd\":\"https://api.real-debrid.com\",\"baseURLad\":\"https://api.alldebrid.com\",\"baseURLpm\":\"https://www.premiumize.me/api\",\"logLevel\":\"debug\",\"logEncoding\":\"console\",\"logFoundTorrents\":false,\"rootURL\":\"https://www.deflix.tv\",\"extraHeadersXD\":null,\"socksProxyAddrTPB\":\"\",\"webConfigurePath\":\"\",\"imdb2metaAddr\":\"\",\"useOAUTH2\":false,\"oauth2authURLrd\":\"https://api.real-debrid.com/oauth/v2/auth\",\"oauth2authURLpm\":\"https://www.premiumize.me/authorize\",\"oauth2tokenURLrd\":\"https://api.real-debrid.com/oauth/v2/token\",\"oauth2tokenURLpm\":\"https://www.premiumize.me/token\",\"oauth2clientIDrd\":\"\",\"oauth2clientIDpm\":\"\",\"oauth2clientSecretRD\":\"\",\"oauth2clientSecretPM\":\"\",\"oauth2encryptionKey\":\"\",\"forwardOriginIP\":false,\"envPrefix\":\"\"}"}

but with errors:

{"error": "Couldn't open go-cache file: open /.cache/deflix-stremio/cache/availability-rd.gob: no such file or directory"}

Any ideas\tips?