feat: add install script packaging

bot_bottle/backend/docker/compose.py

@@ -58,10 +58,17 @@ from .sidecar_bundle import (
 )
 
 
-# Repo root, used as the build context for the bundle Dockerfile.
+# Repo root or installed site-packages root, used as the build context for
+# Dockerfiles that COPY bot_bottle source files.
 _REPO_DIR = str(Path(__file__).resolve().parent.parent.parent.parent)
 
 
+def _sidecar_bundle_dockerfile() -> str:
+    if (Path(_REPO_DIR) / SIDECAR_BUNDLE_DOCKERFILE).is_file():
+        return SIDECAR_BUNDLE_DOCKERFILE
+    return f"bot_bottle/{SIDECAR_BUNDLE_DOCKERFILE}"
+
+
 def bottle_plan_to_compose(plan: DockerBottlePlan) -> dict[str, Any]:
     """Render a Compose v2 spec dict from a fully-resolved
     DockerBottlePlan.
@@ -183,7 +190,7 @@ def _sidecar_bundle_service(plan: DockerBottlePlan) -> dict[str, Any]:
         "image": SIDECAR_BUNDLE_IMAGE,
         "build": {
             "context": _REPO_DIR,
-            "dockerfile": SIDECAR_BUNDLE_DOCKERFILE,
+            "dockerfile": _sidecar_bundle_dockerfile(),
         },
         "container_name": sidecar_bundle_container_name(plan.slug),
         "networks": {