add basic makefile

.gitignore

@@ -1,2 +1,3 @@
 *~
 .cpcache
+/backend/resources/public/compiled/

.idea/watcherTasks.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectTasksOptions" suppressed-tasks="Sass" />
+</project>

Makefile

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+ROOT=$(shell pwd)
+ASSETS_DIR=backend/resources/public/compiled
+
+TARGET_CSS_DIR=$(ASSETS_DIR)/css
+TARGET_CSS_FILE=$(TARGET_CSS_DIR)/style.css
+
+TARGET_JS_DIR=$(ASSETS_DIR)/js
+TARGET_JS_FILE=$(TARGET_JS_DIR)/app.js
+
+SOURCE_ELM_FILES=$(wildcard frontend/src/*.elm)
+SOURCE_SASS_FILE=frontend/assets/sass/style.scss
+
+.PHONY: compile
+compile: $(TARGET_JS_FILE) $(TARGET_CSS_FILE)
+
+$(TARGET_JS_FILE): $(SOURCE_ELM_FILES)
+	mkdir -p $(TARGET_JS_DIR)
+	cd frontend && elm make src/Main.elm --output $(ROOT)/$(APP_JS) --optimize
+
+$(TARGET_CSS_FILE): $(SOURCE_SASS_FILE)
+	mkdir -p $(TARGET_CSS_DIR)
+	sassc --style compressed $(SOURCE_SASS_FILE) > $(TARGET_CSS_FILE)
+
+.PHONY: compile-debug
+compile-debug:
+	cd frontend && elm make src/Main.elm --output $(ROOT)/$(APP_JS) --debug
+	sassc $(SOURCE_SASS_FILE) > $(TARGET_CSS_FILE)
+
+.PHONY: elm-live
+elm-live:
+	cd frontend && elm-live src/Main.elm --pushstate -- --debug
+
+.PHONE: sass-live
+sass-live:
+	while sleep 1; do make -s $(TARGET_CSS_FILE); done

frontend/assets/sass/style.scss

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+html {
+  font-family: sans-serif;
+}