Merge pull request #52 from ijoseph/update_readme

Add instructions to erase on-device non-volatile storage to accept secrets.json changes.

Author: tavdog

README.md

@@ -40,7 +40,7 @@ If using tronbyt_manager in docker replace the ip address to the docker host's i
 Then run the following command:
 
 ```
-pio run --environment tidbyt-gen1 --target upload
+pio run --environment tidbyt-gen1 --target erase --target upload
 ```
 
 If you're flashing to a Tidbyt Gen2, just change to the above to use