Add docker-mariadb

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

packages/docker/mariadb/default.nix

@@ -0,0 +1,42 @@
+{ pkgs, ... }:
+let
+  entrypoint = pkgs.writeTextFile {
+    name = "entrypoint";
+    executable = true;
+    destination = "/bin/entrypoint";
+    text = builtins.readFile ./entrypoint.sh;
+  };
+in
+pkgs.dockerTools.buildImage {
+  name = "mariadb";
+  fromImage = import ../base { inherit pkgs; };
+
+  copyToRoot = pkgs.buildEnv {
+    name = "root";
+    paths = with pkgs; [
+      entrypoint
+      mariadb
+      gnused
+    ];
+    pathsToLink = [
+      "/bin"
+      "/lib"
+      "/share"
+    ];
+  };
+
+  runAsRoot = ''
+    mkdir -p /var/lib/mysql /run/mysqld
+  '';
+
+  config = {
+    Entrypoint = [ "/bin/entrypoint" ];
+    WorkingDir = "/var/lib/mysql";
+    ExposedPorts = {
+      "3306/tcp" = { };
+    };
+    Volumes = {
+      "/var/lib/mysql" = { };
+    };
+  };
+}