feat: add devcontainer for local setup

api/.env.test.example

@@ -0,0 +1,17 @@
+# Test environment. Read by pytest runs and the "Tests: API" launch
+# configurations in .vscode/launch.json.
+#
+# Tests target a separate database (`test_db`) so they don't clobber dev
+# data. Create it once after the postgres container is up:
+#   docker compose -f docker-compose-local.yaml exec postgres \
+#       createdb -U postgres test_db
+
+ENVIRONMENT="test"
+LOG_LEVEL="DEBUG"
+
+UI_APP_URL=http://localhost:3000
+
+DATABASE_URL="postgresql+asyncpg://postgres:postgres@localhost:5432/test_db"
+REDIS_URL="redis://:redissecret@localhost:6379/0"
+
+MINIO_PUBLIC_ENDPOINT=http://localhost:9000