Use certbot for let's encrypt certificate
diff --git a/docker-compose.yml b/docker-compose.yml
index b700a60..c303417 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -17,8 +17,10 @@
       - simpleidnet
       - gerritnet
     volumes:
+      - ./certbot/www/:/var/www/certbot/:ro
       - ./simpleid/identities/:/var/db/simpleid-templates/:ro
       - ./simpleid/www/:/var/www/simpleid/:ro
+      - ./certs/:/etc/nginx/certs/:rw
       - ./nginx/sa.conf:/etc/nginx/conf.d/sa.conf.template:ro
       - ./nginx/empty.conf:/etc/nginx/conf.d/default.conf:ro
       - ./logs/nginx:/var/log/nginx/:rw