fix(frontend): key as config flag

internal/server/http.go

@@ -4,7 +4,6 @@ import (
 	"io/fs"
 	"log"
 	"net/http"
-	"os"
 	"text/template"
 
 	svgtemplater "tomatentum.net/svg-templater"
@@ -97,7 +96,7 @@ func PrepareFrontend(key string) {
 
 		// Execute with environment variables
 		data := map[string]string{
-			"APIKey": os.Getenv("API_KEY"),
+			"APIKey": key,
 			"APIUrl": "",
 		}
 		if err := tmpl.Execute(w, data); err != nil {