Create turn certificate if needed

src/freedombone

 
     apt-get -y install turnserver
 
+    # create a nonce if needed
     if [ ! $VOIP_TURN_NONCE ]; then
         VOIP_TURN_NONCE="$(openssl rand -base64 32 | cut -c1-30)"
     fi
 
+    # create a certificate if needed
+    if [ ! -f /etc/ssl/certs/$DEFAULT_DOMAIN_NAME.pem ]; then
+        if [ ! -f /etc/ssl/certs/$DEFAULT_DOMAIN_NAME.crt ]; then
+            if [ ! -f /etc/ssl/certs/$DEFAULT_DOMAIN_NAME.dhparam ]; then
+                if [[ $LETSENCRYPT_ENABLED != "yes" ]]; then
+                    ${PROJECT_NAME}-addcert -h $DEFAULT_DOMAIN_NAME --dhkey $DH_KEYLENGTH
+                else
+                    ${PROJECT_NAME}-addcert -e $DEFAULT_DOMAIN_NAME -s $LETSENCRYPT_SERVER --dhkey $DH_KEYLENGTH --email $MY_EMAIL_ADDRESS
+                fi
+                check_certificates $DEFAULT_DOMAIN_NAME
+            fi
+        fi
+    fi
+    
     echo '##' > /etc/turnserver/turnserver.conf
     echo '# TurnServer configuration file.' >> /etc/turnserver/turnserver.conf
     echo '#' >> /etc/turnserver/turnserver.conf
     echo '## Certification Authority file.' >> /etc/turnserver/turnserver.conf
     echo "ca_file = \"/etc/ssl/certs/ca-certificates.crt\"" >> /etc/turnserver/turnserver.conf
     echo '' >> /etc/turnserver/turnserver.conf
-    echo '## Server certificate file.' >> /etc/turnserver/turnserver.conf
+    echo '## Server certificate file.' >> /etc/turnserver/turnserver.conf   
     if [ -f /etc/ssl/certs/$DEFAULT_DOMAIN_NAME.pem ]; then
         echo "cert_file = \"/etc/ssl/certs/$DEFAULT_DOMAIN_NAME.pem\"" >> /etc/turnserver/turnserver.conf
     else
         if [ -f /etc/ssl/certs/$DEFAULT_DOMAIN_NAME.crt ]; then
-            echo "cert_file = \"/etc/ssl/certs/$DEFAULT_DOMAIN_NAME.crt\"" >> /etc/turnserver/turnserver.conf
-        else
-
+            echo "cert_file = \"/etc/ssl/certs/$DEFAULT_DOMAIN_NAME.crt\"" >> /etc/turnserver/turnserver.conf           
         fi
     fi
     echo '' >> /etc/turnserver/turnserver.conf