chore: take the version from VERSION.txt only (0.0.3)

VERSION.txt is embedded into the server and the agent, so a plain
go build reports the real version and build.sh no longer injects it.

internal/server/config.go

@@ -3,6 +3,8 @@ package server
 import (
 	"crypto/rand"
 	"encoding/hex"
+
+	lpra "github.com/x-grk/longpolling-remote-access"
 )
 
 // Config keys stored in the config table.
@@ -18,9 +20,9 @@ const (
 // the rendered install.sh and can be changed from the settings page.
 const DefaultHostAddress = "https://REDACTED:8445"
 
-// Version is the server build version, injected at compile time via -ldflags
-// (-X .../internal/server.Version=...). It is the newest version agents update to.
-var Version = "dev"
+// Version is the server build version (see VERSION.txt). It is the newest
+// version agents update to.
+var Version = lpra.Version
 
 // ensureDefaults seeds the host address and a random enroll secret on first boot.
 func (db *DB) ensureDefaults() error {