Add new API endpoints for media retrieval by country and enhance configuration

- Introduced `/api/tmdb` and `/api/collection/missing-locations` endpoints to the backend for improved media management.
- Added a new `get_media_by_country` function in the collection API to fetch media items based on country codes.
- Updated configuration to allow overriding *arr base URLs via environment variables for better flexibility.
- Enhanced frontend with a new `MissingLocations` component and integrated it into the routing structure.
- Improved the `CollectionMap` component to handle country selection and display media items accordingly.
- Added testing dependencies in `requirements.txt` and updated frontend configuration for testing support.

nix/test-vm-simple.nix

@@ -0,0 +1,43 @@
+# Simplified NixOS VM configuration for testing Movie Map
+# This focuses on PostgreSQL; *arr services should be configured separately
+{ config, pkgs, lib, ... }:
+
+{
+  networking = {
+    hostName = "moviemap-test-vm";
+    firewall = {
+      enable = true;
+      allowedTCPPorts = [
+        8080  # Movie Map backend
+        5432  # PostgreSQL
+      ];
+    };
+  };
+
+  # PostgreSQL configuration
+  services.postgresql = {
+    enable = true;
+    ensureDatabases = [ "moviemap_test" ];
+    ensureUsers = [
+      {
+        name = "moviemap";
+        ensureDBOwnership = true;
+      }
+    ];
+    authentication = ''
+      local all all trust
+      host all all 0.0.0.0/0 trust
+    '';
+    settings = {
+      listen_addresses = "'*'";
+    };
+  };
+
+  # System packages
+  environment.systemPackages = with pkgs; [
+    curl
+    jq
+    postgresql
+  ];
+}
+