peer command environment

The peer command requires a few environment variables to work: i.e. CORE_PEER_MSPCONFIGPATH, CORE_PEER_ADDRESS, CORE_PEER_LOCALMSPID, CORE_PEER_TLS_ROOTCERT_FILE.

Unfortunately these don't seem to be documented in the peer command reference, although they do get a mention in the Building Your First Network tutorial. They also appear in the basic network docker-compose.yml file.

In the fabric-devenv Vagrant environment, prefixing peer commands with the following should work:

CORE_PEER_ADDRESS=0.0.0.0:7051 \
CORE_PEER_LOCALMSPID=Org1MSP \
CORE_PEER_MSPCONFIGPATH=/home/vagrant/test-network/crypto-config/peerOrganizations/org1.example.com/users/Admin@org1.example.com/msp \
peer ...