# RP4 — opening removes the traefik file
# mutation in internal/stacks/setup_gate.go:
#   - '\tif err := m.removeSetupGateFile(name); err != nil {\n\t\tm.logger.Printf("[ERROR] [stacks] %s: setup gate opened'
#   + '\tif err := error(nil); err != nil { // RED-PROOF RP4\n\t\tm.logger.Printf("[ERROR] [stacks] %s: setup gate opened'
# go test -run ^TestSetupGate_TheButtonOpensItOnce$ ./internal/stacks
# verdict: RED (assertion)
=== RUN   TestSetupGate_TheButtonOpensItOnce
    setup_gate_test.go:210: file still there after the press
--- FAIL: TestSetupGate_TheButtonOpensItOnce (0.00s)
