Remove references to the old build system

DOCKER_HUB.md

@@ -1,63 +0,0 @@
-# cloud.docker.com Configuration
-
-The automatic build is configured in cloud.docker.com.
-
-The following build configuration is expected:
-
-```yaml
-Source Repository: github.com/netbox-community/netbox-docker
-Build Location: Build on Docker Hub's infrastructure
-Autotest: Internal and External Pull Requests
-Repository Links: Enable for Base Image
-Build Rules:
-- Source Type: Branch
-  Source: release
-  Docker Tag: branches
-  Dockerfile location: Dockerfile
-  Build Context: /
-  Autobuild: on
-  Build Caching: on
-- Source Type: Branch
-  Source: release
-  Docker Tag: prerelease
-  Dockerfile location: Dockerfile
-  Build Context: /
-  Autobuild: on
-  Build Caching: on
-- Source Type: Branch
-  Source: release
-  Docker Tag: release
-  Dockerfile location: Dockerfile
-  Build Context: /
-  Autobuild: on
-  Build Caching: on
-Build Environment Variables:
-# Create an app on Github and use it's OATH credentials here
-- Key: GITHUB_OAUTH_CLIENT_ID
-  Value: <secret>
-- Key: GITHUB_OAUTH_CLIENT_SECRET
-  Value: <secret>
-Build Triggers:
-- Name: Cron Trigger
-  Trigger URL: <generated>
-# Use this trigger in combination with e.g. https://cron-job.org in order to regularly schedule builds
-```
-
-## Background Knowledge
-
-The build system of cloud.docker.com is not made for this kind of project.
-But we found a way to make it work, and this is how:
-
-1. The docker hub build system [allows to overwrite the scripts that get executed
-   for `build`, `test` and `push`](overwrite). See `/hooks/*`.
-2. Shared functionality of the scripts `build`, `test` and `push` is extracted to `/hooks/common`.
-3. The `build` script runs `run_build()` from `/hooks/common`.
-   This triggers either `/build-branches.sh`, `/build-latest.sh` or directly `/build.sh`.
-4. The `test` script just invokes `docker-compose` commands.
-5. The `push` script runs `run_build()` from `hooks/common` with a `--push-only` flag.
-   This causes the `build.sh` script to not re-build the Docker image, but just the just built image.
-
-The _Docker Tag_ configuration setting (`$DOCKER_TAG`) is only used to select the type (_release_, _prerelease_, _branches_) of the build in `hooks/common`.
-Because it has a different meaning in all the other build scripts, it is `unset` after it has served it's purpose.
-
-[overwrite]: https://docs.docker.com/docker-hub/builds/advanced/#override-build-test-or-push-commands

README.md

@@ -124,31 +124,34 @@ docker-compose up -d
 
 From time to time it might become necessary to re-engineer the structure of this setup.
 Things like the `docker-compose.yml` file or your Kubernetes or OpenShift configurations have to be adjusted as a consequence.
+
 Since November 2019 each image built from this repo contains a `org.opencontainers.image.version` label.
 (The images contained labels since April 2018, although in November 2019 the labels' names changed.)
-You can check the label of your local image by running `docker inspect netboxcommunity/netbox:v2.7.1 --format "{{json .ContainerConfig.Labels}}"`.
+You can check the label of your local image by running `docker inspect netboxcommunity/netbox:v2.7.1 --format "{{json .Config.Labels}}"`.
 
 Please read [the release notes][releases] carefully when updating to a new image version.
 
 [releases]: https://github.com/netbox-community/netbox-docker/releases
 
-## Rebuilding & Publishing images
+## Rebuilding the Image
 
 `./build.sh` can be used to rebuild the Docker image. See `./build.sh --help` for more information.
 
-### Publishing Docker Images
+For more details on custom builds [consult our wiki][netbox-docker-wiki-build].
 
-New Docker images are built and published every 24h on the [Docker Build Infrastructure][docker-build-infra].
+[netbox-docker-wiki-build]: https://github.com/netbox-community/netbox-docker/wiki/Build
-`DOCKER_HUB.md` contains more information about the build infrastructure.
 
-[docker-build-infra]: https://hub.docker.com/r/netboxcommunity/netbox/builds/
+### Pre-made Docker Images
+
+New Docker images are built and published every 24h.
 
 ## Tests
 
-To run the tests coming with Netbox, use the `docker-compose.yml` file as such:
+We have a test script.
+It runs Netbox's own unit tests and ensures that all initializers work:
 
 ```bash
-docker-compose run netbox ./manage.py test
+IMAGE=netboxcommunity/netbox:latest ./test.sh
 ```
 
 ## About