Include go version into builds

pkg/command/version.go

@@ -1,10 +1,17 @@
 package command
 
 const (
+	// Version is the current Pgweb application version
 	Version = "0.11.4"
 )
 
 var (
+	// GitCommit contains the Git commit SHA for the binary
 	GitCommit string
+
+	// BuildTime contains the binary build time
 	BuildTime string
+
+	// GoVersion contains the Go runtime version
+	GoVersion string
 )