Detect Docker when using control group v2

src/NzbDrone.Common/EnvironmentInfo/OsInfo.cs

@@ -77,7 +77,9 @@ namespace NzbDrone.Common.EnvironmentInfo
                 FullName = Name;
             }
 
-            if (IsLinux && File.Exists("/proc/1/cgroup") && File.ReadAllText("/proc/1/cgroup").Contains("/docker/"))
+            if (IsLinux &&
+                ((File.Exists("/proc/1/cgroup") && File.ReadAllText("/proc/1/cgroup").Contains("/docker/")) ||
+                 (File.Exists("/proc/1/mountinfo") && File.ReadAllText("/proc/1/mountinfo").Contains("/docker/"))))
             {
                 IsDocker = true;
             }

src/NzbDrone.Common/Instrumentation/Sentry/SentryTarget.cs

@@ -145,6 +145,7 @@ namespace NzbDrone.Common.Instrumentation.Sentry
         {
             SentrySdk.ConfigureScope(scope =>
             {
+                scope.SetTag("is_docker", $"{osInfo.IsDocker}");
             });
         }