MESH_GITEA_URL named 3000 outright. The forge's container publishes 3000 without
fixing the machine side, so the mesh assigns it — and on a node given that port
as a setting it is the operator's number. The mapping that lets the forge go on
binding 3000 does nothing for a caller dialling the machine's loopback, so the
sidecar dialled a port nothing was listening on wherever the two differed.
${port:3000} is the mesh's answer to exactly that question, and it now resolves
in a container's environment as it always has in a file. The forge declares it
listens on 3000, so it may ask.
Still names 3000: the route contribution (hq issue 089) and the `listens` and
`ports` entries, which are the software's own number and belong there.
jschoubben
cf30d4b3d0