Add SSL certificates to backend Docker image

backend/Dockerfile

@@ -4,10 +4,13 @@ FROM harbor.dvirlabs.com/base-images/python:3.11-slim
 # Set working directory
 WORKDIR /app
 
-# Install system dependencies
+# Install system dependencies and SSL certificates
 RUN apt-get update && apt-get install -y \
     gcc \
     postgresql-client \
+    ca-certificates \
+    openssl \
+    && update-ca-certificates \
     && rm -rf /var/lib/apt/lists/*
 
 # Copy requirements file