Docker: added meaningful title to metadata.

Author: thresheek

pkg/docker/Makefile

@@ -124,6 +124,7 @@ Dockerfile.%: ../../version template.Dockerfile
 			-e 's,@@INSTALL@@,$(INSTALL_$(call modname, $*)),g' \
 			-e 's,@@RUN@@,$(RUN_$(call modname, $*)),g' \
 			-e 's,@@MODULE_PREBUILD@@,$(MODULE_PREBUILD_$(call modname, $*)),g' \
+			-e 's,@@MODULE@@,$*,g' \
 			> $@
 
 build-%: Dockerfile.%

pkg/docker/template.Dockerfile

@@ -1,6 +1,6 @@
 FROM @@CONTAINER@@
 
-LABEL org.opencontainers.image.title="Unit"
+LABEL org.opencontainers.image.title="Unit (@@MODULE@@)"
 LABEL org.opencontainers.image.description="Official build of Unit for Docker."
 LABEL org.opencontainers.image.url="https://unit.nginx.org"
 LABEL org.opencontainers.image.source="https://github.com/nginx/unit"