updated github action for ghcr.io, alpine image variants

.github/workflows/docker.yml

@@ -2,14 +2,14 @@ name: Docker Release
 
 on:
   push:
-    tags: [ v*, alpha-*, beta-* ]
+    tags: [ v* ]
-
-env:
-  IMAGE_NAME: miawinter/wave
 
 jobs:
   build:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        image_suffix: ["", "-alpine"]
 
     steps:
     - name: Checkout
@@ -19,11 +19,14 @@ jobs:
       id: meta
       uses: docker/metadata-action@v5
       with:
-        images: ${{ env.IMAGE_NAME }}
+        images: |
+          miawinter/wave
+          ghcr.io/${{ github.repository }}
         tags: |
           type=semver,pattern={{version}}
         flavor: |
           latest=true
+          suffix=${{ matrix.suffix }}, onlatest=true
         labels: |
           maintainer=Mia Rose Winter
           org.opencontainers.image.title=Wave
@@ -34,6 +37,12 @@ jobs:
           org.opencontainers.image.licenses=MIT
           
     - name: Log into the Container registry
+      uses: docker/login-action@v3
+      with:
+        registry: ghcr.io
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+    - name: Log into Docker Hub
       uses: docker/login-action@v3
       with:
         username: ${{ secrets.DOCKERHUB_USERNAME }}
@@ -52,3 +61,4 @@ jobs:
         labels: ${{ steps.meta.outputs.labels }}
         build-args: | 
           VERSION=${{ fromJSON(steps.meta.outputs.json).labels['org.opencontainers.image.version'] }}
+          BASE=8.0${{ matrix.suffix }}

Wave/Dockerfile

@@ -1,6 +1,7 @@
 #See https://aka.ms/customizecontainer to learn how to customize your debug container and how Visual Studio uses this Dockerfile to build your images for faster debugging.
 
-FROM mcr.microsoft.com/dotnet/aspnet:8.0 AS base
+ARG BASE=8.0
+FROM mcr.microsoft.com/dotnet/aspnet:$BASE AS base
 RUN mkdir -p /app/files && chown app /app/files
 RUN mkdir -p /configuration && chown app /configuration
 RUN apt-get update && apt-get install -y curl