use nix as base image instead

Dockerfile

@@ -1,38 +1,16 @@
-# Build Stage with a minimal image
-FROM debian:bullseye-slim AS builder
+# Use the official NixOS image as the base image
+FROM nixos/nix:latest AS builder
 
 # Set the working directory
 WORKDIR /usr/src/app
 
-# Install necessary dependencies
-RUN apt-get update && apt-get install -y \
-    curl \
-    protobuf-compiler \
-    xz-utils
-
 # Copy the source code and flake.nix into the container
 COPY . /usr/src/app
 
-# Create /nix directory and set permissions
-USER root
-RUN mkdir -m 0755 /nix && chown root /nix
-
-# Create nixbld group and users
-RUN groupadd -g 30000 nixbld && \
-    for i in $(seq 1 10); do \
-        useradd -u $((30000 + i)) -g nixbld -G nixbld -m -s /bin/false nixbld$i; \
-    done
-
-# Install Nix and set up the environment
-RUN curl -L https://nixos.org/nix/install | sh -s -- --daemon && \
-    /bin/bash -c "source /root/.nix-profile/etc/profile.d/nix.sh && \
-    exec bash -l -c 'nix-channel --update && nix-env -iA nixpkgs.nix'"
-
 # Start the Nix daemon and develop the environment
-RUN /bin/bash -c "source /root/.nix-profile/etc/profile.d/nix.sh && \
-    /root/.nix-profile/bin/nix-daemon & \
-    cd /usr/src/app && \
-    /root/.nix-profile/bin/nix develop --extra-experimental-features nix-command --extra-experimental-features flakes --command cargo build --release --bin cdk-mintd"
+RUN nix-channel --update && \
+    nix-env -iA nixpkgs.nix && \
+    nix develop --extra-experimental-features nix-command --extra-experimental-features flakes --command cargo build --release --bin cdk-mintd
 
 # Create a runtime stage
 FROM debian:bullseye-slim