add how-to-setup.md

docs/dev/how-to-setup.md

@@ -0,0 +1,26 @@
+Setup google API key for google sheet
+------------------------------------------
+### create project an enable api
+* go to https://console.cloud.google.com/
+* create and select a project on the top left
+* searching for "Google Drive API" and enable it, url should be some thing like (https://console.cloud.google.com/marketplace/product/google/drive.googleapis.com)
+* searching for "Google Sheets API" and enable it
+
+### create key
+* click `create credentials` button
+* select `Google Drive API` and `Web server` and `Application data`
+* select `No, I'm not using them`
+* click `Next`
+* filling `Service account name` and `Service account description`
+* click `Done`
+* select `CREDENTIALS` and your new service
+* click `KEYS`, `ADD KEY`
+* select `JSON` and click create
+
+
+### share google sheet to service account
+* go to google drive
+* right click the sheet you want to share
+* click `Share`
+* paste the service account email to `People` field
+* click `Done`