fix(docker): add OpenSSL libraries for ARM64 SSL support (#58)

Add libssl-dev and libffi-dev to fix SSL module availability issues
when building Docker images on ARM64 architecture. This resolves
pip installation failures when connecting to HTTPS repositories.

Author: qinxuye

docker/Dockerfile.backend

@@ -27,6 +27,8 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     pkg-config \
     python3-dev \
     curl \
+    libssl-dev \
+    libffi-dev \
     libgl1 \
     libglib2.0-0 \
     libsm6 \