feat: reads certs locally if available (#3196)

internal/support/cli/certs.go

@@ -3,9 +3,22 @@ package cli
 import (
 	"crypto/tls"
 	"embed"
+	"os"
+
+	log "github.com/sirupsen/logrus"
 )
 
 func ReadCertificates(certs embed.FS) (tls.Certificate, error) {
+	if pair, err := tls.LoadX509KeyPair("dozzle_cert.pem", "dozzle_key.pem"); err == nil {
+		log.Infof("Found dozzle certificate and key at ./dozzle_cert.pem and ./dozzle_key.pem")
+		return pair, nil
+	} else {
+		if !os.IsNotExist(err) {
+			log.Errorf("Failed to load dozzle certificate and key: %v", err)
+			log.Warnf("Falling back to shared certificate and key")
+		}
+	}
+
 	cert, err := certs.ReadFile("shared_cert.pem")
 	if err != nil {
 		return tls.Certificate{}, err