chore(api): add schema target to makefile

api/Makefile

@@ -6,9 +6,16 @@ CPU_CORES := $(shell N=$$(nproc); echo $$(( $$N > 4 ? 4 : $$N )))
 install:
 	poetry install --all-extras
 
+export DJANGO_SETTINGS_MODULE=config.settings.local
+
 lint:
 	poetry run pylint \
 		--jobs=$(CPU_CORES) \
 		--output-format=colorized \
 		--recursive=true \
 		config funkwhale_api tests
+
+SCHEMA_FILE ?= schema.yml
+schema:
+	poetry run funkwhale-manage spectacular --file $(SCHEMA_FILE)
+	if command -v npx > /dev/null; then npx prettier --write $(SCHEMA_FILE); fi