Following are the steps to publish the Docker image.

1. Copy Dockerfile and startup.sh in docker directory

   docker/Dockerfile

   docker/startup.sh

2. Create the following directories

   docker/root/origin-geth

   docker/root/1000

3. Copy the origin and auxiliary chain data to the following location

   docker/chain_data/origin-geth

   docker/chain_data/<auxiliary chain id>

4. The origin-geth and directory should have the following content

   - dev_pass (file) 
   - genesis.json (file)
   - geth (directory)
       |- chaindata
       |- lightchaindata
       |- LOCK
       |- nodekey
       |- nodes
       |- transactions.rlp
       
   - keystore (directory)
       |- UTC--xxxxxxxxx
       |- UTC--xxxxxxxxx
       .
       .

5. Move the mosaic config file in configs directory.

6. Move the gateway config of dev chain to a folder with below folder structure:

   docker/root/origin-geth/1000/gateway-{gatewayAddress}/gateway-config.json

7. Go to docker folder. Run the following command to build the docker image.

   docker build -t mosaicdao/dev-chains . -f docker/Dockerfile

8. Authenticate docker with Docker login if not already done.

9. Run the following command to publish the Docker image.

   docker push mosaicdao/dev-chains