[TASK] Add usermapping for linux (#498)

Author: ineswillenbrock

Makefile

@@ -7,10 +7,10 @@ help: ## Displays this list of targets with descriptions
 .PHONY: docs
 docs: ## Generate projects docs (from "Documentation" directory)
 	mkdir -p Documentation-GENERATED-temp
-	docker run --rm --pull always -v "$(shell pwd)":/project -t ghcr.io/typo3-documentation/render-guides:latest --config=Documentation
+	docker run --user $(shell id -u):$(shell id -g) --rm --pull always -v "$(shell pwd)":/project -t ghcr.io/typo3-documentation/render-guides:latest --config=Documentation
 
 
 .PHONY: test-docs
 test-docs: ## Test the documentation rendering
 	mkdir -p Documentation-GENERATED-temp
-	docker run --rm --pull always -v "$(shell pwd)":/project -t ghcr.io/typo3-documentation/render-guides:latest --config=Documentation --no-progress --minimal-test
+	docker run --user $(shell id -u):$(shell id -g) --rm --pull always -v "$(shell pwd)":/project -t ghcr.io/typo3-documentation/render-guides:latest --config=Documentation --no-progress --minimal-test