Removed Docker requirement for building SIF file

Makefile

@@ -1,44 +1,22 @@
-DOCKER ?= docker
 APPTAINER ?= apptainer
 OVERLAY_DIR ?= ./overlay
-SHARED_DIR ?= ./shared
-MAX_THREADS ?= $(shell grep -c processor /proc/cpuinfo)
+NUM_THREADS ?= $(shell grep -c processor /proc/cpuinfo)
 
 UID := $(shell id -u)
 GID := $(shell id -g)
 
-.DEFAULT_GOAL := .docker_build
+.DEFAULT_GOAL := mobileinsight.sif
 
-.docker_build: Dockerfile
-	"$(DOCKER)" build --build-arg "MAX_THREADS=$(MAX_THREADS)" -t mobileinsight .
-	touch "$@"
+mobileinsight.sif: mobileinsight.def
+	"$(APPTAINER)" build --build-arg="NUM_THREADS=$(NUM_THREADS)" "$@" "$<"
 
-mobileinsight.tar.gz: .docker_build
-	"$(DOCKER)" save mobileinsight:latest | gzip > "$@"
-
-mobileinsight.sif: mobileinsight.def .docker_build
-	"$(APPTAINER)" build "$@" "$<"
-
-run: .docker_build
-	@mkdir -p "$(SHARED_DIR)"
-	@test -n "$(shell docker image ls -q mobileinsight)" \
-		|| (echo Cannot find image mobileinsight:latest, has it been built yet? 1>&2 \
-		&& false)
-	@"$(DOCKER)" run --rm -it --privileged -v "$(SHARED_DIR):/mnt" \
-		-e TERM -u root --entrypoint bash mobileinsight:latest
-
-app-run: mobileinsight.sif
+run: mobileinsight.sif
 	@mkdir -p "$(OVERLAY_DIR)"
 	@lsmod | grep overlay > /dev/null || sudo modprobe overlay
 	@$(APPTAINER) run --overlay "$(OVERLAY_DIR)" \
 		-B "/run/user/$(UID)" mobileinsight.sif
 
 clean:
-	"$(DOCKER)" container prune
-	"$(DOCKER)" image prune -a
-	rm -f .docker_build mobileinsight.tar.gz mobileinsight.sif
+	rm -f mobileinsight.sif $(OVERLAY_DIR)
 
-clean-data:
-	rm -rf $(OVERLAY_DIR) $(SHARED_DIR)
-
-.PHONY: sc-run run clean clean-data
+.PHONY: run clean