diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 0000000..8267130
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1,6 @@
+node_modules
+.env
+.env.*
+.git
+.gitignore
+*.log
diff --git a/.env.example b/.env.example
index 28109ca..2ea2937 100644
--- a/.env.example
+++ b/.env.example
@@ -22,6 +22,9 @@ JWT_SECRET=your-jwt-secret-key-change-this-in-production
 # Application URLs
 APP_URL=http://localhost:3000
 
+# Base URL for emails and magic links (used by server-side code)
+BASE_URL=http://localhost:3000
+
 # OIDC Provider (for Outline Wiki SSO)
 OIDC_CLIENT_ID=outline-wiki
 OIDC_CLIENT_SECRET=<generate-with-openssl-rand-hex-32>