Use vspd version as cache buster for .css files.

This will ensure when VSP admins update to a new version of vspd, web visitors will not use cached old .css files.

vspd.go

@@ -94,6 +94,7 @@ func run(ctx context.Context) error {
 		Debug:                cfg.WebServerDebug,
 		Designation:          cfg.Designation,
 		MaxVoteChangeRecords: maxVoteChangeRecords,
+		VspdVersion:          version.String(),
 	}
 	err = webapi.Start(ctx, shutdownRequestChannel, &shutdownWg, cfg.Listen, db,
 		dcrd, wallets, apiCfg)

webapi/homepage.go

@@ -35,6 +35,7 @@ type vspStats struct {
 	BlockHeight       uint32
 	NetworkProportion float32
 	RevokedProportion float32
+	VspdVersion       string
 }
 
 var statsMtx sync.RWMutex
@@ -62,6 +63,7 @@ func initVSPStats() {
 		VspClosed:    cfg.VspClosed,
 		Debug:        cfg.Debug,
 		Designation:  cfg.Designation,
+		VspdVersion:  cfg.VspdVersion,
 	}
 }
 

webapi/templates/header.html

@@ -8,9 +8,9 @@
         <title>Decred VSP - {{ .VspStats.Designation }}</title>
 
         <link rel="stylesheet" href="/public/css/vendor/bootstrap.min.css" />
-        <link rel="stylesheet" href="/public/css/vspd.css" />
+        <link rel="stylesheet" href="/public/css/vspd.css?v={{ .VspStats.VspdVersion }}" />
         <!-- fonts.css should be last to ensure dcr fonts take precedence. -->
-        <link rel="stylesheet" href="/public/css/fonts.css" />
+        <link rel="stylesheet" href="/public/css/fonts.css?v={{ .VspStats.VspdVersion }}" />
 
         <!--  Custom favicon  -->
         <!-- Apple PWA -->

webapi/webapi.go

@@ -35,6 +35,7 @@ type Config struct {
 	Debug                bool
 	Designation          string
 	MaxVoteChangeRecords int
+	VspdVersion          string
 }
 
 const (