fix: correct Docker build context for SSH server

The Docker build command for the SSH server container was incorrectly pointing to the Dockerfile instead of the directory containing it. This change corrects the build context to the correct directory, ensuring that all necessary files in `./ci-tests/` are included during the build process. This fix addresses issues with missing dependencies during the container build phase.

.forgejo/workflows/test.yml

@@ -25,7 +25,7 @@ jobs:
 
       - name: Build and run SSH Server Docker Container
         run: |
-          docker build -t my-ssh-server ./ci-tests/Dockerfile
+          docker build -t my-ssh-server ./ci-tests/
           docker run -d -p 2222:22 --name ssh-server my-ssh-server
 
       - name: Copy public key to Docker container