Remove conf if it exists

src/freedombone-app-jitsi

@@ -222,8 +222,13 @@ function install_jitsi {
         exit 78372
     fi
 
+    if [ -f /etc/nginx/sites-available/${JITSI_DOMAIN_NAME}.conf ]; then
+        rm /etc/nginx/sites-available/${JITSI_DOMAIN_NAME}.conf
+        systemctl restart nginx
+    fi
+
     # add jitsi repo
-    jitsi_deb_repo=binary
+    jitsi_deb_repo=unstable
     apt-get -yq install wget debconf-utils
     install_nodejs jitsi
     npm install -g browserify@13.1.1