[FAB-13381] Update dev mode documentation

- Update a chaincode path and keep it a bit vague about
  the exact location of the config file.
- Add an environment variable when start peer dev-mode

Change-Id: Ie5ef5f1399efa5960373b984223209132c72cd96
Signed-off-by: kuro1 <412681778@qq.com>

Author: CsterKuroi

docs/source/peer-chaincode-devmode.rst

@@ -21,33 +21,29 @@ Start the orderer
 
     ORDERER_GENERAL_GENESISPROFILE=SampleDevModeSolo orderer
 
-The above starts the orderer in the local environment the orderer
-configuration as defined in ``sampleconfig/orderer.yaml`` with the
-genesisprofile directive overridden to use the SampleDevModeSolo profile
-for bootstrapping the network.
+The above starts the orderer with the SampleDevModeSolo profile.
 
 Start the peer in dev mode
 --------------------------
 
 ::
 
-    peer node start --peer-chaincodedev=true
+    CORE_PEER_CHAINCODELISTENADDRESS=0.0.0.0:7052 peer node start --peer-chaincodedev=true
 
-The above command starts the peer using the default ``sampleconfig/msp``
-MSP. The ``--peer-chaincodedev=true`` puts it in “dev” mode.
+The above command starts the peer using the default MSP.
+The ``--peer-chaincodedev=true`` puts it in “dev” mode.
 
 Create channels ch1 and ch2
 ---------------------------
 
-Generate the transactions for creating the channels using ``configtxgen`` tool.
+Generate the transactions for creating the channels using the ``configtxgen``
+tool with the SampleSingleMSPChannel profile.
 
 ::
 
    configtxgen -channelID ch1 -outputCreateChannelTx ch1.tx -profile SampleSingleMSPChannel
    configtxgen -channelID ch2 -outputCreateChannelTx ch2.tx -profile SampleSingleMSPChannel
 
-where SampleSingleMSPChannel is a channel profile in ``sampleconfig/configtx.yaml``
-
 ::
 
     peer channel create -o 127.0.0.1:7050 -c ch1 -f ch1.tx
@@ -68,7 +64,7 @@ Start the chaincode
 
 ::
 
-    cd examples/chaincode/go/chaincode_example02/cmd
+    cd examples/chaincode/go/example02/cmd
     go build -o example02
     CORE_CHAINCODE_LOGLEVEL=debug CORE_PEER_ADDRESS=127.0.0.1:7052 CORE_CHAINCODE_ID_NAME=mycc:0 ./example02