Consistantly use the same directory for the arduino-cli install

Author: hamishcoleman

Diff for: Makefile

@@ -20,18 +20,18 @@ PACKAGE_URL := https://dl.espressif.com/dl/package_esp32_index.json
 
 ARDUINO_URL := https://raw.githubusercontent.com/arduino/arduino-cli/master/install.sh
 bin/arduino-cli: /usr/bin/curl
-	mkdir -p ~/bin
-	curl -fsSL $(ARDUINO_URL) | BINDIR=~/bin sh
+	mkdir -p bin
+	curl -fsSL $(ARDUINO_URL) | BINDIR=bin sh
 
 .PHONY: $(BOARD_FILENAME_SLUG)
 $(BOARD_FILENAME_SLUG): bin/arduino-cli
-	~/bin/arduino-cli config init --additional-urls $(PACKAGE_URL)
-	~/bin/arduino-cli core update-index
-	arduino-cli core install esp32:esp32
+	bin/arduino-cli config init --additional-urls $(PACKAGE_URL)
+	bin/arduino-cli core update-index
+	bin/arduino-cli core install esp32:esp32
 
 build-deps:
 	sudo apt-get -y install curl
 	$(MAKE) $(BOARD_FILENAME_SLUG)
 
 %.ino.$(BOARD_FILENAME_SLUG).bin: %.ino
-	arduino-cli compile -b $(BOARD) $<
+	bin/arduino-cli compile -b $(BOARD) $<