pub fn load_appsettings(mode: AppMode) -> Option<Value>Expand description
Load the merged appsettings JSON (base + environment overlay + env overrides).
按运行模式自动合并对应的 appsettings.{Mode}.json overlay:
Development→appsettings.Development.jsonProduction→appsettings.Production.json
Environment variables prefixed with APP__ override the corresponding JSON values.
For example, APP__App__Address=0.0.0.0:8080 overrides {"App": {"Address": "..."}}.