Please explain why we use ./teardownFabric.sh before using ./stopFabric.sh and ./startFabric.sh.
Note that if you've run the teardown script, the next time you start the runtime, you'll need to create a new PeerAdmin card just like you did on first-time script.
./teardownFabric.sh will remove all docker files related to Fabric. That means your system will clean and you can start Fabric from the beginning.
Look up here: https://github.com/hyperledger/composer/blob/c7e94a64252e51625fe74c0e9a521a8d41281dd0/packages/composer-website/jekylldocs/installing/development-tools.md
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