Standardize tasks for all build types

[rjanja]

Currently all tasks are loaded, so we have a :docker_build, :local_build and :remote_build because they need to have distinct names.

Although we have a generic :build task, all it does is invoke a single task from the above three based on the build type.

We should consider adding other generic build-related tasks:

• verify_config
• compile
• generate_release
• copy_release

Some of these task names are already in use, so this would be a breaking change, but would allow for less confusion when hooking custom tasks.