To start:

1. Define env variables
export GOOGLE_API_KEY=...
export SPREADSHEET_ID=...
export SERVER_PORT=8080

2. Builder docker container
docker build -t mjb-exchange-rates-clj .

3. Start docker container
docker run -p $SERVER_PORT:$SERVER_PORT -e GOOGLE_API_KEY -e SPREADSHEET_ID mjb-exchange-rates-clj