Fix documentation (broken partial rendering and missing id)

[sportebois]

As I used the service registration doc I stumbled upon a few errors, which I try to address here:

Broken partial rendering for service (de)registration (CLI)

Problematic pages:

• https://www.consul.io/docs/commands/services/register.html
• https://www.consul.io/docs/commands/services/deregister.html

Both pages include a partial for the API options, but the current version doesn't render this partial:
Current live website capture:

The fix is simple (but took me a while since I'm new to middleman), and it really comes down to renaming those files so that the partials are evaluated and not just outputted as raw content.

Here's a sample of the local test as I verified the fix:

Incomplete JSON sample for the service registration

Page: https://www.consul.io/docs/agent/services.html
Two small issues here:

• JSON is invalid, we there's a missing comma before the connect block (nothing a user wouldn't be able to fix after copying the template, but I believe having a template ready to be customized rather than fixed is nice)

the other point is really nitpicking, but the template is preceded by (emphasis mine)

This example shows all possible fields
then just after the template we have
A service definition must include a name and may optionally provide an id, tags, address, meta, port, enable_tag_override, and check. The id is set to the name if not provided. It is required that all services have a unique ID per node, so if names might conflict then unique IDs should be provided.

So the template is supposed to be complete, and the very first field described is the id field, but this field is not present in the template?!
In this PR I added the field to remove any confusion or "oh wait, did I missed something?" moment for the future reader.

[hanshasselberg]

Good catch!