Update Dockerfile

Dockerfile

@@ -9,10 +9,12 @@ RUN touch /etc/nix/nix.conf
 RUN echo "donotUnpack = true" > /etc/nix/nix.conf && echo "experimental-features = nix-command flakes" > /etc/nix/nix.conf && echo "allow-import-from-derivation = true" >> /etc/nix/nix.conf && echo "extra-experimental-features = fetch-closure" >> /etc/nix/nix.conf 
 RUN mkdir /root/test-node
 RUN mkdir /root/ipc
-RUN export TMPDIR="/tmp"
 WORKDIR /root/test-node
 RUN cat /etc/nix/nix.conf
 COPY . .
+RUN nix build .#cardano-cli-ng -o cardano-cli-ng-build
+RUN nix build .#cardano-node-ng -o cardano-node-ng-build
+RUN nix build .#cardano-cli -o cardano-cli-build
 ENV PATH="/root/.nix-profile/bin:/nix/var/nix/profiles/default/bin:/nix/var/nix/profiles/default/sbin:/root/test-node/cardano-cli-ng-build/bin:/root/test-node/cardano-node-ng-build/bin:/root/test-node/cardano-cli-build/bin:$PATH"
 RUN direnv allow
-CMD nix build .#cardano-cli-ng -o cardano-cli-ng-build && nix build .#cardano-cli -o cardano-cli-build && nix develop .# --command just run-demo && nix run .#run-cardano-node
+CMD nix develop .# --command just run-demo