Update README.md (#23)

ginokent · Dec 1, 2020 · 44ee946 · 44ee946
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 # bqtableschema
+
 BigQuery table schema struct generator
 
 [![main](https://github.com/djeeno/bqtableschema/workflows/main/badge.svg)](https://github.com/djeeno/bqtableschema/tree/main)
 [![codecov](https://codecov.io/gh/djeeno/bqtableschema/branch/main/graph/badge.svg)](https://codecov.io/gh/djeeno/bqtableschema)
 
 ## generate
+
 ```console
-$ cd /path/to/your/repository
+$ cd /path/to/your/golang-project-repository
 
-$ export GOOGLE_APPLICATION_CREDENTIALS=/path/to/serviceaccount/keyfile.json
+$ ## Create a directory where bqtableschema will generate the code.
+$ mkdir -p bqtableschema
+$ cd bqtableschema
 
+$ ## Set the required environment variables.
+$ export GOOGLE_APPLICATION_CREDENTIALS=/path/to/serviceaccount/keyfile.json
 $ export GCLOUD_PROJECT_ID=bigquery-public-data  ## ref. https://console.cloud.google.com/bigquery?p=bigquery-public-data&page=project
 $ export BIGQUERY_DATASET=hacker_news            ## ref. https://console.cloud.google.com/bigquery?p=bigquery-public-data&d=hacker_news&page=dataset
 
+$ ## generate
 $ go run github.com/djeeno/bqtableschema
 ```