listening on /work/practice/invoice.sock
--- 1. right key via client (expect 2 invoice lines)
INV-001  Example Bakery  120.50  paid
INV-002  Sample Bikes  89.00  opeTerminated
--- 3. no key at all: client with keyless file, and raw request
error: cannot reach service: ENOENT
ile, and raw request
error: no access (HTTP 401)
{"error":"no access"}
HTTP_401
--- 4. right key but try to send a change (POST, DELETE)
{"error":"no access (read-only service)"}
HTTP_403
{"error":"no access (read-only service)"}
HTTP_403
--- 5. times the key appears in client output (expect 0)
0
--- service stopped; client now:
error: cannot reach service: ECONNREFUSED
