Refactor to use rsync server

scripts/sync

@@ -1,17 +1,16 @@
 #!/usr/bin/env bash
 
-readonly BUCKET="${B2_BUCKET}"
+readonly RSYNC_USER="${RSYNC_USER}"
+readonly RSYNC_SERVER="${RSYNC_SERVER}"
 
 main() {
   local filepath="$1"
   local name
   name="$(basename "${filepath}")"
 
-  backblaze-b2 upload-file \
-	       --threads 2 \
-	       "${BUCKET}" \
-	       "${HOME}/timelapse/${name}" \
-	       "${HOSTNAME}/timelapse/${name}"
+  rsync --archive --verbose \
+	"${HOME}/timelapse/${name}" \
+	"${RSYNC_USER}@${RSYNC_SERVER}:/timelapse/${name}"
 
   # Delete outdated files.
   # This assumes the timelapse is created on an hourly basis.