文件上传功能添加，注意使用Path.Combine处理通用路径问题（windows||docker)

CloudBuilder/CloudBuilder.Web.Entry/Program.cs

@@ -2,6 +2,7 @@
 using CloudBuilder.Core.Extensions;
 using CloudBuilder.Core.Service;
 using CloudBuilder.Security.Data;
+using CloudBuilder.Security.Policy;
 using CloudBuilder.Security.Service;
 using DocumentFormat.OpenXml.Office2016.Drawing.ChartDrawing;
 using Microsoft.AspNetCore.Http.Features;
@@ -98,13 +99,13 @@ provider.Mappings[".flac"] = "audio/x-flac";
 provider.Mappings[".m3u8"] = "application/vnd.apple.mpegurl";
 provider.Mappings[".lrc"] = "application/octet-stream";
 //虚拟文件,App.Configuration[VirtualPathPolicy.VirtualPath_RealPath]这个路径一定要存在，不然直接出错
-string physicalDir = app.Configuration["FileServiceSettings:PhysicalFileDirectory"];
+string physicalDir = app.Configuration[ServiceSettingsPolicy.PhysicalFileDirectory];
 if (!string.IsNullOrEmpty(physicalDir))
 {
     app.UseStaticFiles(new StaticFileOptions()
     {
         FileProvider = new PhysicalFileProvider(physicalDir),
-        RequestPath = app.Configuration["FileServiceSettings:RequestPath"],
+        RequestPath = app.Configuration[ServiceSettingsPolicy.RequestPath],
         ContentTypeProvider = provider
     });
 }