diff --git a/.gitignore b/.gitignore
index 310501d..dc19619 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,4 @@ sqlite.db
 .idea/
 .DS_Store
 .ipynb_checkpoints/
+**.env
diff --git a/crawler/.env.sample b/crawler/.env.sample
new file mode 100644
index 0000000..ac3a171
--- /dev/null
+++ b/crawler/.env.sample
@@ -0,0 +1,3 @@
+# Copy me to .env and source me
+
+export ROUTING_API_KEY="<CHANGE ME>" # fetch from https://console.cloud.google.com/google/maps-apis/