add e2e test

.gitea/workflows/e2e-test.yml

@@ -0,0 +1,40 @@
+name: E2E Test
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  e2e-test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Build Docker image
+        run: docker build -t ssh-server-test .
+
+      - name: Run SSH server
+        run: |
+          docker run -d --name ssh-server-test -p 2222:22 -e COMMAND="echo 'SSH connection successful'" ssh-server-test
+
+      - name: Wait for server to start
+        run: sleep 5
+
+      - name: Test SSH connection
+        run: |
+          output=$(ssh -p 2222 -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null root@localhost "echo test")
+          if [ "$output" = "test" ]; then
+            echo "SSH connection test passed"
+          else
+            echo "SSH connection test failed"
+            exit 1
+          fi
+
+      - name: Cleanup
+        run: docker stop ssh-server-test