feat(server): API proxy routes for services and nodes (TDD)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/config.py

@@ -0,0 +1,33 @@
+"""Configuration loader for the Farm Manager server.
+
+Reads node definitions from a JSON config file. The path defaults to
+``/app/config.json`` but can be overridden via the ``CONFIG_PATH``
+environment variable.
+"""
+
+import json
+import os
+
+_config = None
+
+
+def _load_config():
+    global _config
+    if _config is None:
+        config_path = os.environ.get("CONFIG_PATH", "/app/config.json")
+        with open(config_path) as f:
+            _config = json.load(f)
+    return _config
+
+
+def get_nodes() -> list[dict]:
+    """Return the list of node definitions from the config file."""
+    return _load_config()["nodes"]
+
+
+def get_node_url(node_name: str) -> str | None:
+    """Return the agent base URL for *node_name*, or ``None`` if unknown."""
+    for node in get_nodes():
+        if node["name"] == node_name:
+            return f"http://{node['host']}:{node['agent_port']}"
+    return None