Add transmission container

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

packages/docker/transmission-protonvpn/default.nix

@@ -0,0 +1,49 @@
+{ pkgs, ... }:
+let
+  entrypoint = pkgs.writeTextFile {
+    name = "entrypoint";
+    executable = true;
+    destination = "/bin/entrypoint";
+    text = builtins.readFile ./entrypoint.sh;
+  };
+in
+pkgs.dockerTools.buildImage {
+  name = "transmission-protonvpn";
+  fromImage = import ../base { inherit pkgs; };
+
+  copyToRoot = pkgs.buildEnv {
+    name = "root";
+    paths = with pkgs; [
+      entrypoint
+      transmission_4
+      flood-for-transmission
+      wireguard-tools
+      libnatpmp
+      curl
+      jq
+    ];
+    pathsToLink = [
+      "/bin"
+      "/lib"
+      "/share"
+    ];
+  };
+
+  runAsRoot = ''
+    mkdir -p /tmp
+  '';
+
+  config = {
+    Entrypoint = [ "entrypoint" ];
+    ExposedPorts = {
+      "9091/tcp" = { };
+    };
+    Volumes = {
+      "/etc/transmission" = { };
+      "/var/lib/transmission" = { };
+    };
+    Env = [
+      "TRANSMISSION_WEB_HOME=${pkgs.flood-for-transmission}"
+    ];
+  };
+}