feat: CI: setup test SMTP server

.woodpecker.yml

@@ -3,6 +3,7 @@ pipeline:
     image: python
     environment:
       - DATABSE_URL=postgres://postgres:password@database:5432/postgres
+      - EMAIL_URL=smtp://admin:password@localhost:10025
     commands:
       - pip install virtualenv
       - make env
@@ -14,3 +15,10 @@ services:
     image: postgres
     environment:
       - POSTGRES_PASSWORD=password
+
+  smtp:
+    image: maildev/maildev
+    environment:
+      - MAILDEV_SMTP_PORT=10025
+      - MAILDEV_INCOMING_USER=admin
+      - MAILDEV_INCOMING_PASS=password