This commit introduces a huge change in the build process.
What changed:
- Dockerfile.ldap was integrated into Dockerfile as a seperate
[build stage][multistage-build].
- All the build scripts were refactored according to this.
- The `docker-compose.yml` file was adjusted likewise.
- The main build script, `/build.sh`, now always builds all
targets (formerly called variants).
- The minimal requirements for Docker and docker-compose
have increased.
- The build on hub.docker.com must be adjusted.
This change should also fix#156 permanently.
[multistage-build]: https://docs.docker.com/develop/develop-images/multistage-build/
When building netbox-docker on Travis, it happened too often that the
build failed because of Github's API rate limits. These apply for all
requests, but if the request is unauthenticated they are applied by IP.
This is bad for netbox-docker, as we build on Travis where the build-
workers are shared with the rest of the world.
This commit adds the possibility to define OAuth credentials as
documented at [1]. Hopefully this leads to more reliable releases of
netbox-docker images.
[1] https://developer.github.com/v3/#increasing-the-unauthenticated-rate-limit-for-oauth-applications
