build docker via nix

.dockerignore

@@ -1,4 +0,0 @@
-/target
-
-.env*
-!.envrc

Dockerfile

@@ -1,22 +0,0 @@
-FROM rust:1.62.0-slim-buster
-
-WORKDIR /app
-
-RUN cargo init .
-
-COPY Cargo.* ./
-
-RUN cargo build --release \
-  && rm -rf src
-
-COPY ./src ./src
-
-RUN cargo install --bin vnetod --path . \
-  && rm -rf ./src Cargo.*
-
-VOLUME ["/data"]
-
-WORKDIR /data
-
-ENTRYPOINT ["/usr/local/cargo/bin/vnetod"]
-

flake.nix

@@ -10,8 +10,7 @@
 
       version = "${cargoToml.package.version}_${builtins.substring 0 8 self.lastModifiedDate}_${self.shortRev or "dirty"}";
     in
-    utils.lib.eachDefaultSystem
-      (system:
+    utils.lib.eachDefaultSystem (system:
       let
         inherit (nixpkgs) lib;
         pkgs = import nixpkgs { inherit system; };
@@ -24,6 +23,16 @@
 
           doCheck = true;
         };
+
+        docker = pkgs.dockerTools.buildLayeredImage {
+          name = "pleshevskiy/vnetod";
+          tag = cargoToml.package.version;
+          config = {
+            Volumes."/data" = { };
+            WorkingDir = "/data";
+            Entrypoint = [ "${vnetod}/bin/vnetod" ];
+          };
+        };
       in
       {
         apps.default = {
@@ -31,7 +40,10 @@
           program = "${vnetod}/bin/vnetod";
         };
 
-          packages.default = vnetod;
+        packages = {
+          inherit docker;
+          default = vnetod;
+        };
 
         devShell = pkgs.mkShell {
           packages = with pkgs; [ cargo rustc rustfmt clippy rust-analyzer ];