web: fix acme.sh pre and post hooks

Fixes: https://github.com/jitsi/docker-jitsi-meet/issues/114

web/rootfs/etc/cont-init.d/10-config

@@ -25,8 +25,8 @@ if [[ $DISABLE_HTTPS -ne 1 ]]; then
             $STAGING \
             --issue \
             --standalone \
-            --pre-hook "if [[ -f /var/run/s6/services/nginx ]]; then s6-svc -d /var/run/s6/services/nginx; fi" \
-            --post-hook "if [[ -f /var/run/s6/services/nginx ]]; then s6-svc -u /var/run/s6/services/nginx; fi" \
+            --pre-hook "if [[ -d /var/run/s6/services/nginx ]]; then s6-svc -d /var/run/s6/services/nginx; fi" \
+            --post-hook "if [[ -d /var/run/s6/services/nginx ]]; then s6-svc -u /var/run/s6/services/nginx; fi" \
             -d $LETSENCRYPT_DOMAIN
         rc=$?
         if [[ $rc -eq 1 ]]; then