Add information about GHCR

Author: nemchik

.github/workflows/BuildImage.yml

@@ -2,29 +2,61 @@ name: Build Image
 
 on: [push, pull_request, workflow_dispatch]
 
+env:
+  ENDPOINT: "linuxserver/mods" #don't modify
+  BASEIMAGE: "replace_baseimage" #replace
+  MODNAME: "replace_modname" #replace
+
 jobs:
   build:
-    env:
-      DOCKERHUB: "linuxserver/mods" #don't modify
-      BASEIMAGE: "baseimagename" #replace
-      MODNAME: "modname" #replace
-
     runs-on: ubuntu-latest
     steps:
       - uses: actions/[email protected]
 
       - name: Build image
-        id: build
         run: |
-          docker build --no-cache -t ${DOCKERHUB}:${BASEIMAGE}-${MODNAME}-${{ github.sha }} .
+          docker build --no-cache -t ${{ github.sha }} .
 
-      - name: Push image
+      - name: Tag image
         if: ${{ github.ref == format('refs/heads/{0}-{1}', env.BASEIMAGE, env.MODNAME) }}
         run: |
-          # Tag image
-          docker tag ${DOCKERHUB}:${BASEIMAGE}-${MODNAME}-${{ github.sha }} ${DOCKERHUB}:${BASEIMAGE}-${MODNAME}
-          # Login to DockerHub
+          docker tag ${{ github.sha }} ${ENDPOINT}:${BASEIMAGE}-${MODNAME}
+          docker tag ${{ github.sha }} ${ENDPOINT}:${BASEIMAGE}-${MODNAME}-${{ github.sha }}
+          docker tag ${{ github.sha }} ghcr.io/${ENDPOINT}:${BASEIMAGE}-${MODNAME}
+          docker tag ${{ github.sha }} ghcr.io/${ENDPOINT}:${BASEIMAGE}-${MODNAME}-${{ github.sha }}
+
+      - name: Credential check
+        if: ${{ github.ref == format('refs/heads/{0}-{1}', env.BASEIMAGE, env.MODNAME) }}
+        run: |
+          echo "CR_USER=${{ secrets.CR_USER }}" >> $GITHUB_ENV
+          echo "CR_PAT=${{ secrets.CR_PAT }}" >> $GITHUB_ENV
+          echo "DOCKERUSER=${{ secrets.DOCKERUSER }}" >> $GITHUB_ENV
+          echo "DOCKERPASS=${{ secrets.DOCKERPASS }}" >> $GITHUB_ENV
+          if [[ "${{ secrets.CR_USER }}" == "" && "${{ secrets.CR_PAT }}" == "" && "${{ secrets.DOCKERUSER }}" == "" && "${{ secrets.DOCKERPASS }}" == "" ]]; then
+            echo "::error::Push credential secrets missing."
+            echo "::error::You must set either CR_USER & CR_PAT or DOCKERUSER & DOCKERPASS as secrets in your repo settings."
+            echo "::error::See https://github.com/linuxserver/docker-mods/blob/master/README.md for more information/instructions."
+            exit 1
+          fi
+
+      - name: Login to GitHub Container Registry
+        if: ${{ github.ref == format('refs/heads/{0}-{1}', env.BASEIMAGE, env.MODNAME) && env.CR_USER && env.CR_PAT }}
+        run: |
+          echo "${{ secrets.CR_PAT }}" | docker login ghcr.io -u ${{ secrets.CR_USER }} --password-stdin
+
+      - name: Push tags to GitHub Container Registry
+        if: ${{ github.ref == format('refs/heads/{0}-{1}', env.BASEIMAGE, env.MODNAME) && env.CR_USER && env.CR_PAT }}
+        run: |
+          docker push ghcr.io/${ENDPOINT}:${BASEIMAGE}-${MODNAME}-${{ github.sha }}
+          docker push ghcr.io/${ENDPOINT}:${BASEIMAGE}-${MODNAME}
+
+      - name: Login to DockerHub
+        if: ${{ github.ref == format('refs/heads/{0}-{1}', env.BASEIMAGE, env.MODNAME) && env.DOCKERUSER && env.DOCKERPASS }}
+        run: |
           echo ${{ secrets.DOCKERPASS }} | docker login -u ${{ secrets.DOCKERUSER }} --password-stdin
-          # Push all of the tags
-          docker push ${DOCKERHUB}:${BASEIMAGE}-${MODNAME}-${{ github.sha }}
-          docker push ${DOCKERHUB}:${BASEIMAGE}-${MODNAME}
+
+      - name: Push tags to DockerHub
+        if: ${{ github.ref == format('refs/heads/{0}-{1}', env.BASEIMAGE, env.MODNAME) && env.DOCKERUSER && env.DOCKERPASS }}
+        run: |
+          docker push ${ENDPOINT}:${BASEIMAGE}-${MODNAME}-${{ github.sha }}
+          docker push ${ENDPOINT}:${BASEIMAGE}-${MODNAME}

Dockerfile.complex

@@ -1,5 +1,5 @@
 ## Buildstage ##
-FROM lsiobase/alpine:3.12 as buildstage
+FROM ghcr.io/linuxserver/baseimage-alpine::3.12 as buildstage
 
 RUN \
  echo "**** install packages ****" && \