Add gen-nginx for the read path

tesseract/genconf/main.go

@@ -56,6 +56,8 @@ func main() {
 		generateEnv(*configFile)
 	case "gen-key":
 		generateKeys(*configFile)
+	case "gen-nginx":
+		generateNginx(*configFile)
 	case "gen-roots":
 		generateRoots(args[1:])
 	default:
@@ -103,6 +105,8 @@ func showHelp() {
 	fmt.Printf("               Combines global roots and log-specific extraroots into roots.pem.\n\n")
 	fmt.Printf("  gen-key      Generate prime256v1 private keys for each log (only if they don't exist).\n")
 	fmt.Printf("               Creates EC private key files at the path specified in log.secret.\n\n")
+	fmt.Printf("  gen-nginx    Generate nginx configuration files for each log's monitoring endpoint.\n")
+	fmt.Printf("               Creates nginx-<hostname>.conf files in each log's localdirectory.\n\n")
 	fmt.Printf("  gen-roots    Download root certificates from a Certificate Transparency log.\n")
 	fmt.Printf("               Options: --source <url> (default: https://rennet2027h2.log.ct.ipng.ch/)\n")
 	fmt.Printf("                        --output <file> (default: roots.pem)\n\n")