Remove Alpine and Slim from OS matrix in .woodpecker.yml

The commit removes Alpine and Slim from the OS matrix in .woodpecker.yml, leaving only versions 16 and 18.
Remove Alpine and Slim from OS matrix in .woodpecker.yml

The commit removes Alpine and Slim from the OS matrix in .woodpecker.yml, leaving only versions 16 and 18. The pipeline has been updated to use only alpine images with the version number as a tag. The Dockerfile now uses the version number to pull an alpine image instead of specifying both the version and OS.

.woodpecker.yml

@@ -1,22 +1,19 @@
 matrix:
-  os:
-    - alpine
-    - slim
   version:
     - 16
     - 18
     - 20
 
 pipeline:
-  ${version}-${os}:
+  ${version}-alpine:
     image: woodpeckerci/plugin-docker-buildx
     settings:
       repo: lttech/pm2
       platforms: linux/amd64,linux/arm64
       tags:
-        - ${version}-${os}
+        - ${version}
       build_args:
-        - tag=${version}-${os}
+        - version=${version}
       username: lttech
       password:
         from_secret: docker_lttech

Dockerfile

@@ -1,4 +1,4 @@
-ARG tag=16-alpine
-FROM node:${tag}
+ARG version=16
+FROM node:${version}-alpine
 RUN npm i -g pm2
 RUN pm2 install typescript