feat: Error pages + Makefile improvements

Error pages: Add error pages for 404 and 50X errors by nginx
Makefile improvements: Remove shit.sh and replace it by improving the
Makefile

frontend/Makefile

@@ -1,12 +1,3 @@
-dist/minified:
-	mkdir -p dist/minified
-
-UGLIFYJS := ./node_modules/.bin/uglifyjs
-# $1: The file to minify
-define minify
-	$(shell ${UGLIFYJS} --mangle --compress -o "./dist/minified/$(notdir $1)" -- $1)
-endef
-
 node_modules:
 	npm install
 
@@ -14,15 +5,25 @@ node_modules:
 watch: node_modules
 	npm start
 
+clean:
+	rm -rf dist/
+
 .PHONY: build
-build: node_modules dist/minified
+build: prod
+prod: node_modules clean
 	@echo Building with parcel
 	./node_modules/.bin/parcel build --out-dir dist/app src/index.html
+	./node_modules/.bin/parcel build --out-dir dist src/lost.html src/error.html
+	sed -e "s/\/src/\/app\/src/g" --in-place dist/app/index.html
 
-	@echo Minifying
-	$(foreach file, $(wildcard dist/*.js), $(call minify, $(file)))
-	$(shell ls -lah ./dist/minified)
+	tar -czf lateinicus-web.tar.gz dist/
 
-.PHONY: watch
-watch:
-	npm start
+dev: node_modules clean
+	@echo Building with parcel
+	./node_modules/.bin/parcel build --out-dir dist/app src/index.html
+	./node_modules/.bin/parcel build --out-dir dist src/lost.html src/error.html
+	sed -e "s/\/src/\/app\/src/g" --in-place dist/app/index.html
+
+	chmod 604 -R dist/app/*
+	chmod 604 dist/error.html dist/lost.html
+	chmod 705 dist dist/app