Add tests and update README

Makefile

@@ -1,6 +1,6 @@
 SHELL := bash
 
-.PHONY: check clean reformat dist docker amd64 index
+.PHONY: check clean reformat dist test
 
 all: dist
 
@@ -13,17 +13,8 @@ check:
 reformat:
 	scripts/format-code.sh
 
+test:
+	scripts/run-tests.sh
+
 dist:
 	python3 setup.py sdist
-
-docker:
-	scripts/build-docker.sh
-	for lang in de-de en-us es-es fr-fr it-it nl ru-ru sv-se; do \
-        LARYNX_LANGUAGE=$$lang scripts/build-docker.sh; \
-    done
-
-amd64:
-	NOBUILDX=1 scripts/build-docker.sh
-
-index:
-	bin/make_sample_html.py local/ > index.html