Update Dockerfile

Dockerfile

@@ -26,7 +26,16 @@ RUN npm install --save express ws
 
 COPY --chown=pn nginx.conf /etc/nginx/sites-available/default
 
-RUN ssh-keygen
+# Create the .ssh directory if it does not exist
+RUN mkdir -p /home/pn/.ssh
+
+# Generate SSH key pair non-interactively
+RUN ssh-keygen -t rsa -b 4096 -f /home/pn/.ssh/id_rsa -N ""
+
+# Optionally, set permissions for the .ssh directory and keys
+RUN chmod 700 /home/pn/.ssh && \
+    chmod 600 /home/pn/.ssh/id_rsa && \
+    chmod 644 /home/pn/.ssh/id_rsa.pub
 
 COPY --chown=pn . .