Add the docker role to all relevant roles

I need this especially for lazydocker

modules/heimdall/default.nix

@@ -1,5 +1,8 @@
 { ... }:
 {
+  imports = [
+    "${inputs.self}/modules/docker"
+  ];
   virtualisation.oci-containers = {
     backend = "docker";
     containers."heimdall" = {

modules/plex/default.nix

@@ -1,5 +1,8 @@
 { inputs, config ? { }, ... }:
 {
+  imports = [
+    "${inputs.self}/modules/docker"
+  ];
   age.secrets.plexClaim.file = "${inputs.self}/scrts/plex_claim.age";
   networking = {
     firewall.allowedTCPPorts = [

modules/rss-bridge/default.nix

@@ -3,6 +3,9 @@ let
   whitelist = builtins.toFile "whitelist.txt" ''*'';
 in
 {
+  imports = [
+    "${inputs.self}/modules/docker"
+  ];
   virtualisation.oci-containers = {
     backend = "docker";
     containers."rss-brige" = {