diff --git a/voice-server/.DS_Store b/voice-server/.DS_Store
new file mode 100644
index 0000000..5008ddf
Binary files /dev/null and b/voice-server/.DS_Store differ
diff --git a/voice-server/.gitignore b/voice-server/.gitignore
new file mode 100644
index 0000000..2bc99ea
--- /dev/null
+++ b/voice-server/.gitignore
@@ -0,0 +1,2 @@
+*.env
+service_account_key.*
diff --git a/voice-server/service_account_key.json b/voice-server/service_account_key.json
deleted file mode 100644
index 1edc961..0000000
--- a/voice-server/service_account_key.json
+++ /dev/null
@@ -1,12 +0,0 @@
-{
-  "type": "service_account",
-  "project_id": "flowy-dev-c6d9a",
-  "private_key_id": "db049cd9b42454a218d765e26bffa2a105ca2d30",
-  "private_key": "-----BEGIN PRIVATE KEY-----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\nB6GpK9MiYbH8q7zSczmDUQ==\n-----END PRIVATE KEY-----\n",
-  "client_email": "flowy-rpi-voice-server@flowy-dev-c6d9a.iam.gserviceaccount.com",
-  "client_id": "116958682610004993063",
-  "auth_uri": "https://accounts.google.com/o/oauth2/auth",
-  "token_uri": "https://oauth2.googleapis.com/token",
-  "auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs",
-  "client_x509_cert_url": "https://www.googleapis.com/robot/v1/metadata/x509/flowy-rpi-voice-server%40flowy-dev-c6d9a.iam.gserviceaccount.com"
-}