ci: add GitHub Actions job for ed25519 key support

- Add a new job `support-ed25519-key` to the GitHub Actions workflow
- Add steps to the new job for checking out code, adding public and private keys to the environment, and creating a new SSH server
- Add steps to the new job for testing the `id_ed25519` key using `appleboy/ssh-action`
- Add a new private SSH key file `testdata/.ssh/id_ed25519`
- Add a new public SSH key file `testdata/.ssh/id_ed25519.pub`

Signed-off-by: appleboy <appleboy.tw@gmail.com>

.github/workflows/ssh-server.yml

@@ -283,3 +283,57 @@ jobs:
           script_stop: true
           script: |
             whoami
+
+  support-ed25519-key:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: add public key to env
+        run: |
+          echo "PUBLIC_KEY<<EOF" >> $GITHUB_ENV
+          cat testdata/.ssh/id_ed25519.pub >> $GITHUB_ENV
+          echo "EOF" >> $GITHUB_ENV
+          echo "======= public key ========="
+          cat testdata/.ssh/id_ed25519.pub
+          echo "============================"
+          echo "PRIVATE_KEY<<EOF" >> $GITHUB_ENV
+          cat testdata/.ssh/id_ed25519 >> $GITHUB_ENV
+          echo "EOF" >> $GITHUB_ENV
+          echo "======= private key ========="
+          cat testdata/.ssh/id_ed25519
+          echo "============================"
+
+      - name: create new ssh server
+        run: |
+          docker run -d \
+          --name=openssh-server \
+          --hostname=openssh-server \
+          -p 2222:2222 \
+          -e PUBLIC_KEY="${{ env.PUBLIC_KEY }}" \
+          -e SUDO_ACCESS=false \
+          -e PASSWORD_ACCESS=true  \
+          -e USER_PASSWORD=password  \
+          -e USER_NAME=linuxserver.io \
+          --restart unless-stopped \
+          lscr.io/linuxserver/openssh-server:latest
+          docker exec openssh-server sh -c "hostname -i" > ip.txt
+          echo "REMOTE_HOST<<EOF" >> $GITHUB_ENV
+          cat ip.txt >> $GITHUB_ENV
+          echo "EOF" >> $GITHUB_ENV
+          echo "======= container ip address ========="
+          cat ip.txt
+          echo "======================================"
+          sleep 2
+
+      - name: testing id_ed25519 key
+        uses: appleboy/ssh-action@v1.0.3
+        with:
+          host: ${{ env.REMOTE_HOST }}
+          username: linuxserver.io
+          key: ${{ env.PRIVATE_KEY }}
+          port: 2222
+          script: |
+            whoami
+            ls -al

testdata/.ssh/id_ed25519

@@ -0,0 +1,7 @@
+-----BEGIN OPENSSH PRIVATE KEY-----
+b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW
+QyNTUxOQAAACDoi7FltQCqpWporKh61nJUPIeazUYdzdstncoeU5XS2AAAAKBF5e2SReXt
+kgAAAAtzc2gtZWQyNTUxOQAAACDoi7FltQCqpWporKh61nJUPIeazUYdzdstncoeU5XS2A
+AAAEBrsLG1vSg08yaQgYM46KQW93Lz2ZikS1tTMH35gfHhpOiLsWW1AKqlamisqHrWclQ8
+h5rNRh3N2y2dyh5TldLYAAAAFnlvdXJfZW1haWxAZXhhbXBsZS5jb20BAgMEBQYH
+-----END OPENSSH PRIVATE KEY-----

testdata/.ssh/id_ed25519.pub

@@ -0,0 +1 @@
+ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIOiLsWW1AKqlamisqHrWclQ8h5rNRh3N2y2dyh5TldLY your_email@example.com