Only change if cert file exists

src/freedombone-app-mailpile

 
     # set ssl certs, just in case we want to use them later
     if [[ $ONION_ONLY == "no" ]]; then
-        sed -i "s|#ssl_cert =.*|ssl_cert = </etc/letsencrypt/live/${DEFAULT_DOMAIN_NAME}/fullchain.pem|g" /etc/dovecot/conf.d/10-ssl.conf
-        sed -i "s|ssl_cert =.*|ssl_cert = </etc/letsencrypt/live/${DEFAULT_DOMAIN_NAME}/fullchain.pem|g" /etc/dovecot/conf.d/10-ssl.conf
-        sed -i "s|#ssl_key =.*|ssl_key = </etc/letsencrypt/live/${DEFAULT_DOMAIN_NAME}/privkey.pem|g" /etc/dovecot/conf.d/10-ssl.conf
-        sed -i "s|ssl_key =.*|ssl_key = </etc/letsencrypt/live/${DEFAULT_DOMAIN_NAME}/privkey.pem|g" /etc/dovecot/conf.d/10-ssl.conf
+        if [ -f /etc/letsencrypt/live/${DEFAULT_DOMAIN_NAME}/fullchain.pem ]; then
+            sed -i "s|#ssl_cert =.*|ssl_cert = </etc/letsencrypt/live/${DEFAULT_DOMAIN_NAME}/fullchain.pem|g" /etc/dovecot/conf.d/10-ssl.conf
+            sed -i "s|ssl_cert =.*|ssl_cert = </etc/letsencrypt/live/${DEFAULT_DOMAIN_NAME}/fullchain.pem|g" /etc/dovecot/conf.d/10-ssl.conf
+            sed -i "s|#ssl_key =.*|ssl_key = </etc/letsencrypt/live/${DEFAULT_DOMAIN_NAME}/privkey.pem|g" /etc/dovecot/conf.d/10-ssl.conf
+            sed -i "s|ssl_key =.*|ssl_key = </etc/letsencrypt/live/${DEFAULT_DOMAIN_NAME}/privkey.pem|g" /etc/dovecot/conf.d/10-ssl.conf
+        fi
 
         groupadd ssl-cert
         usermod -a -G ssl-cert dovecot