Update the build script so it actually changes the Minecraft version

README.md

@@ -12,7 +12,7 @@ docker run -p 25565:25565 rehashedsalt/minecraft-forge:1.16.5-36.1.4-1.0.0
 
 And badda bing, badda boom, you'll have a Minecraft Forge server of whatever the tag is.
 
-For obvious reason, you **should never use the :latest tag!**
+The "latest" tag of each version of Minecraft is somewhere along the lines of "1.16.5-36.1.14-master". See Dockerhub for more info.
 
 ## Server Console
 

build.sh

@@ -20,7 +20,11 @@ docker buildx create --use
 for mc in ${mcversions[@]}; do
 	forge="${forgeversions[$mc]}"
 	echo "Building image for Minecraft $mc, Forge $forge, CI_COMMIT_REF_NAME of $CI_COMMIT_REF_NAME"
+	# --no-cache is required for clean builds
 	docker buildx build \
+		--build-arg MINECRAFT_VERSION="$mc" \
+		--build-arg FORGE_VERSION="$forge" \
+		--no-cache \
 		--platform linux/amd64 \
 		--tag "$CI_HUB_USERNAME/$CI_PROJECT_NAME:$mc-$forge-${CI_COMMIT_REF_NAME:=bleeding}" \
 		--push \