- Each connect attempt, including initialization, times out after 1 minute,
and PostgreSQL DSNs without connect_timeout get connect_timeout=30, since
lib/pq honours the context only while dialing.
- A service increments right after connecting, so a restart writes even
when the interval outlasts the process.
- A config path that is a directory (Docker's stand-in for a missing
bind-mount source) fails with a clear message.
- Generated service names take the first free suffix, and suffixed names
are reserved so an explicit name cannot silently collide with them.
- counter_key inside a service's config map is rejected instead of being
overwritten.
- Unknown keys in the config file log a warning without blocking start.
- A .dockerignore keeps local configs and .env out of the build context.
tiennm99