docs: provide steps for updating and releasing this SDK (#70)

Once a team is onboarded to this SDK, it is expected that they will be
responsible for keeping the code for their service up-to-date. We didn't
have documentation to tell them how to do that; this adds those docs.

CONTRIBUTING.md

@@ -1,20 +1,19 @@
 ## Hello Contributors!
   Thx for your interest! We're so glad you're here.
 
-### Important Resources
-  - bugs: [https://github.com/equinix/equinix-sdk-go/issues](https://github.com/equinix/metal/issues)
-
 ### Code of Conduct
 Available via [https://github.com/equinix/equinix-sdk-go/blob/master/.github/CODE_OF_CONDUCT.md](https://github.com/equinix/metal/blob/master/.github/CODE_OF_CONDUCT.md)
 
 ### Environment Details
 [https://github.com/equinix/equinix-sdk-go/blob/master/Makefile](https://github.com/equinix/equinix-sdk-go/blob/master/Makefile)
 
 ### How to Submit Change Requests
+
 Please submit change requests and / or features via [Issues](https://github.com/equinix/equinix-sdk-go/issues). There's no guarantee it'll be changed, but you never know until you try. We'll try to add comments as soon as possible, though.
 
 #### Pull Requests
-All command changes must be reflected in the documentation, this includes new commands and changes to options. The documentation is generated via `make generate-docs`.
+
+The code in this repo is largely generated from OpenAPI specifications for Equinix APIs.  In general, we anticipate that updates to these specifications will come from automation or from Equinix employees.  Pull Requests that modify tooling such as `make` tasks, generator versions, or generator configuration, must also include any updates to the generated code.
 
 ### How to Report a Bug
 Bugs are problems in code, in the functionality of an application or in its UI design; you can submit them through [Issues](https://github.com/equinix/equinix-sdk-go/issues) as well.

DEVELOPMENT.md

@@ -1,6 +1,6 @@
 # Development
 
-## Contents
+## Repository Contents
 
 - `Makefile` includes tasks to generate and validate the full SDK and to onboard a new service to the SDK
 - `Makefile.<service>` includes tasks for generating and validating a single service from its OpenAPI spec
@@ -83,3 +83,24 @@ While we aim to publish OpenAPI specs that can be used as-is for code generation
 3. ``patchfilename`` should be in format: ``<patch_index>-<short_patch_decription_or_identifier>.patch``
 4. Run ``make -f Makefile.<service> patch`` to reapply the changes to the fetched OpenAPI spec and confirm that the patched spec includes the expected changes
 5. Run `make -f Makefile.<service> generate` to regenerate the code using the patched spec and confirm that the code generates successfully and works as expected
+
+## Update the OpenAPI spec for a service
+
+The steps below may vary by service, depending on decisions made by the CODEOWNERS for that service, but by default the process for pulling in the latest OpenAPI specification for a service and regenerating the code is:
+
+1. Publish the updated OpenAPI specification (that happens outside of this repository)
+2. If necessary, update the `SPEC_BASE_URL` and `SPEC_ROOT_FILE` to match the URL where the updated OpenAPI specification is published
+3. Go to the [Actions page](https://github.com/equinix/equinix-sdk-go/actions) and find the sync workflow for your service, and click the workflow name.  The name will be in the format `Sync <service> API spec`.
+4. Click the gray `Run workflow` button, check that `main` is selected in the popup, and then click the green `Run workflow` button in the popup to run the sync workflow
+5.  The sync workflow will open a Pull Request (PR) that includes the OpenAPI specification updates as well as any code changes caused by the update.
+
+After merging your service changes you can release a new version of this SDK that includes your updates.
+
+## Release the SDK
+
+This SDK uses a Semantic Release action to automatically determine the next release version based on Conventional Commit tags in commit messages.  There is a push-button workflow for releasing the SDK after changes are made:
+
+1. Navigate to the [Release workflow](https://github.com/equinix/equinix-sdk-go/actions/workflows/release.yaml).
+2. Click the gray `Run workflow` button, check that `main` is selected in the popup, and then click the green `Run workflow` button in the popup to run the sync workflow
+
+The release workflow will determine the next version, regenerate the code with the updated version number, and create a [GitHub Release](https://github.com/equinix/equinix-sdk-go/releases).