message: Make `SAFE_BRANCH_NAME` compatible with docker tags
diff: @@ -90,7 +90,7 @@ K3D_NAME := k3s-$(shell echo $(CI_BUILD_TAG) | sed -E 's/.*(.{31})$$/\1/')
  # Name of the Branch we are currently in
  BRANCH_NAME := $(shell git rev-parse --abbrev-ref HEAD)
  -SAFE_BRANCH_NAME := $(shell echo $(BRANCH_NAME) | sed -E 's:/:_:g')
  +SAFE_BRANCH_NAME := $(shell echo $(BRANCH_NAME) | sed -E 's/[^[:alnum:]_.-]//g' | cut -c 1-128)
  # Init the file that is used to hold the image tag cross-reference table
  $(shell >build.txt)
  