Test with Open-WebUI with full nix, podman and docker

At the end a docker compose is easier (wait for 25.04 maybe)

hosts/open-webui/docker.nix

@@ -0,0 +1,136 @@
+{ config, pkgs, ... }:
+let
+  litellmSettings = {
+
+    general_settings = {
+      proxy_batch_write_at = 60; # Batch write spend updates every 60s
+      database_connection_pool_limit = 10; # Limit the number of database connections
+      disable_spend_logs = true; # Turn off writing each transaction to the DB
+      disable_error_logs = true; # Turn off writing LLM exceptions to DB
+      allow_requests_on_db_unavailable = true; # Allow requests if DB is unavailable
+    };
+
+    environment_variables = {
+      LITELLM_MODE = "Production";
+    };
+
+    credential_list = [
+      {
+        credential_name = "dp_azure_openai_credential";
+        credential_values = {
+          api_base = "os.environ/AZURE_API_BASE_OPENAI";
+          api_key = "os.environ/AZURE_API_KEY_OPENAI";
+        };
+        credential_info = {
+          description = "Azure OpenAI credentials for DP";
+        };
+      }
+      {
+        credential_name = "dp_azure_ai_credential";
+        credential_values = {
+          api_base = "os.environ/AZURE_API_BASE_AI";
+          api_key = "os.environ/AZURE_API_KEY_AI";
+        };
+        credential_info = {
+          description = "Azure AI credentials for DP";
+        };
+      }
+    ];
+
+    model_list = [
+      {
+        model_name = "text-embedding-3-large";
+        litellm_params = {
+          model = "azure/text-embedding-3-large";
+          litellm_credential_name = "dp_azure_openai_credential";
+        };
+        model_info = {
+          mode = "embedding";
+        };
+      }
+      {
+        model_name = "text-embedding-3-small";
+        litellm_params = {
+          model = "azure/text-embedding-3-small";
+          litellm_credential_name = "dp_azure_openai_credential";
+        };
+        model_info = {
+          mode = "embedding";
+        };
+      }
+      {
+        model_name = "GPT-3.5 Turbo";
+        litellm_params = {
+          model = "azure/gpt-35-turbo";
+          litellm_credential_name = "dp_azure_openai_credential";
+        };
+      }
+      {
+        model_name = "GPT-4o";
+        litellm_params = {
+          model = "azure/gpt-4o";
+          litellm_credential_name = "dp_azure_openai_credential";
+        };
+      }
+      {
+        model_name = "GPT o3 Mini";
+        litellm_params = {
+          model = "azure/o3-mini";
+          litellm_credential_name = "dp_azure_openai_credential";
+        };
+      }
+      {
+        model_name = "GPT-4o Mini";
+        litellm_params = {
+          model = "azure/gpt-4o-mini";
+          litellm_credential_name = "dp_azure_openai_credential";
+        };
+      }
+      {
+        model_name = "Dall-e 3";
+        litellm_params = {
+          model = "azure/dall-e-3";
+          litellm_credential_name = "dp_azure_openai_credential";
+        };
+        model_info = {
+          mode = "image_generation";
+        };
+      }
+      {
+        model_name = "azure-openai-4o-audio";
+        litellm_params = {
+          litellm_credential_name = "dp_azure_openai_credential";
+          model = "azure/gpt-4o-audio-preview";
+        };
+      }
+      {
+        model_name = "DeepSeek-R1";
+        litellm_params = {
+          litellm_credential_name = "dp_azure_ai_credential";
+          model = "azure_ai/deepseek-r1";
+        };
+      }
+    ];
+  };
+in
+{
+
+  age.secrets = {
+    open-webui.file = ../../secrets/open-webui.age;
+  };
+
+  my = {
+
+    virtualisation.docker.enable = true;
+
+    utils = {
+      commons.enable = true;
+      commons.gc.enable = true;
+      lxc-standard.enable = true;
+    };
+
+    virtualisation.proxmox.enable = true;
+  };
+
+  system.stateVersion = "24.11";
+}