How to import your account by private key
An example of how to retrieve your private key from your wallet can be found here. Then in the node folder you need to connect to the geth console and import account as in example is given below:
Attach to the geth console.
docker-compose exec node geth attach data/geth.ipc
In the console type
Exit console and then restart container with
Keep in mind that you need to use the same password to unlock your account as you used to import it.
How to locate your keystore
If you unlocked the account without using the new key generation method, its private key is stored in json format inside the container, in order to find it you need to connect directly to the container again and run the command shown below:
docker-compose exec rootnode geth account list
An example of what the response to the command looks like and how to correctly save this key to the keystore folder is shown below:
#to save key from container you should get your docker service id
(CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
92b12f674eb4 qblockchain/q-client:v1.3.8 "/bin/sh -c 'mix do …" 4 days ago Up 4 days 0.0.0.0:8080->4000/tcp, :::8080->4000/tcp, 0.0.0.0:8081->4001/tcp, :::8081->4001/tcp)
docker cp 92b12f674eb4:/root/.ethereum/keystore/Creation-Date--Your-Account ./