Modernize images and move PHP 8.1 to legacy

PHP 8.1 is end-of-life. It is dropped from the default build and test
matrices. 8.1 and 8.1-alpine are still built, multi-arch, by the
manual legacy job (workflow_dispatch with legacy=true), together with
7.2, 7.3, 7.4 and 8.0. This replaces manual-build.yml.

Makefile

@@ -1,21 +1,41 @@
 IMAGE_NAME?=jkaninda/nginx-php-fpm
+PHP_VERSIONS?=8.2 8.3 8.4 8.5
+LATEST_PHP?=8.5
+
 .PHONY: all
 all: build
+
 ##@ Build
 .PHONY: build
-build: build-81 build-82 build-83 build-84
-.PHONY: build-80
-build-80:
-	 docker build --build-arg phpVersion=8.0 -f src/docker/8.0/Dockerfile -t ${IMAGE_NAME}:8.0 .
-.PHONY: build-81
-build-81:
-	 docker build --build-arg phpVersion=8.1 -f src/docker/Dockerfile -t ${IMAGE_NAME}:8.1 .
-.PHONY: build-82
-build-82:
-	 docker build --build-arg phpVersion=8.2 -f src/docker/Dockerfile -t ${IMAGE_NAME}:8.2 .
-.PHONY: build-83
-build-83:
-	 docker build --build-arg phpVersion=8.3 -f src/docker/Dockerfile -t ${IMAGE_NAME}:8.3 .
-.PHONY: build-84
-build-84:
-	 docker build --build-arg phpVersion=8.4 -f src/docker/Dockerfile -t ${IMAGE_NAME}:8.4 .
+build: $(addprefix build-,$(PHP_VERSIONS))
+
+.PHONY: build-alpine
+build-alpine: $(addsuffix -alpine,$(addprefix build-,$(PHP_VERSIONS)))
+
+.PHONY: build-latest
+build-latest: build-$(LATEST_PHP) build-$(LATEST_PHP)-alpine
+	docker tag ${IMAGE_NAME}:$(LATEST_PHP) ${IMAGE_NAME}:latest
+	docker tag ${IMAGE_NAME}:$(LATEST_PHP)-alpine ${IMAGE_NAME}:alpine
+
+# Legacy images (7.2, 7.3, 7.4, 8.0). PHP 8.1 is legacy too but uses the
+# shared Dockerfiles: make build-8.1 / make build-8.1-alpine
+.PHONY: build-7.2 build-7.3 build-7.4 build-8.0
+build-7.2 build-7.3 build-7.4 build-8.0: build-%:
+	docker build -f src/docker/$*/Dockerfile -t ${IMAGE_NAME}:$* .
+
+.PHONY: build-%-alpine
+build-%-alpine:
+	docker build --build-arg phpVersion=$* -f src/docker/Dockerfile.alpine -t ${IMAGE_NAME}:$*-alpine .
+
+.PHONY: build-%
+build-%:
+	docker build --build-arg phpVersion=$* -f src/docker/Dockerfile -t ${IMAGE_NAME}:$* .
+
+##@ Test
+.PHONY: test
+test: build-$(LATEST_PHP)
+	IMAGE=${IMAGE_NAME}:$(LATEST_PHP) ./tests/integration.sh
+
+.PHONY: test-alpine
+test-alpine: build-$(LATEST_PHP)-alpine
+	IMAGE=${IMAGE_NAME}:$(LATEST_PHP)-alpine ./tests/integration.sh