Improve reinstall of mempoolspace

rootfs/standard/usr/bin/mynode_docker_images.sh

@@ -51,6 +51,8 @@ while [ 1 ]; do
             CURRENT=$(cat $MEMPOOLSPACE_UPGRADE_URL_FILE)
         fi
         if [ "$CURRENT" != "$MEMPOOLSPACE_UPGRADE_URL" ]; then
+            docker rmi mempoolspace || true
+
             cd /opt/mynode
             rm -rf mempoolspace
             wget $MEMPOOLSPACE_UPGRADE_URL -O mempool.zip

rootfs/standard/usr/bin/mynode_reinstall_app.sh

@@ -23,6 +23,8 @@ elif [ "$APP" = "rtl" ]; then
     rm -f /home/bitcoin/.mynode/.rtl_url
 elif [ "$APP" = "mempoolspace" ]; then
     rm -f /mnt/hdd/mynode/settings/mempoolspace_url
+    systemctl stop mempoolspace
+    docker rmi mempoolspace
 elif [ "$APP" = "joinmarket" ]; then
     rm -f /home/bitcoin/.mynode/.joinmarket_url
 elif [ "$APP" = "whirlpool" ]; then