Update docker entry

Dockerfile

@@ -56,11 +56,9 @@ RUN set -e && \
 
 FROM mcr.microsoft.com/dotnet/aspnet:9.0
 
-WORKDIR /certs
-RUN apt update && apt upgrade -y && \
-    apt install -y openssl && \
-    openssl genrsa -out private_key.pem 2048 && \
-    openssl rsa -in private_key.pem -pubout -out public_key.pem
+WORKDIR /
+COPY cert-gen.sh /cert-gen.sh
+RUN chmod +x /cert-gen.sh
 
 WORKDIR /app