Pull request: websvc: add system info

Merge in DNS/adguard-home from websvc-system-info to master

Squashed commit of the following:

commit 333aaa0602da254e25e0262a10080bf44a3718a7
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Thu May 12 16:32:32 2022 +0300

    websvc: fmt

commit d8a35bf71dcc59fdd595494e5b220e3d24516728
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Thu May 12 16:10:11 2022 +0300

    websvc: refactor, imp tests

commit dfeb24f3f35513bf51323d3ab6f717f582a1defc
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Wed May 11 20:52:02 2022 +0300

    websvc: add system info

internal/v1/cmd/cmd.go

@@ -20,7 +20,8 @@ import (
 func Main(clientBuildFS fs.FS) {
 	// # Initial Configuration
 
-	rand.Seed(time.Now().UnixNano())
+	start := time.Now()
+	rand.Seed(start.UnixNano())
 
 	// TODO(a.garipov): Set up logging.
 
@@ -35,6 +36,7 @@ func Main(clientBuildFS fs.FS) {
 			IP:   net.IP{127, 0, 0, 1},
 			Port: 3001,
 		}},
+		Start:   start,
 		Timeout: 60 * time.Second,
 	})