Finish MVP and dockerize

apps/backend/fastapi/app/api/routes/versions.py

@@ -0,0 +1,31 @@
+from __future__ import annotations
+
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.api.deps import get_current_user, get_db
+from app.schemas import BranchCreateRequest, VersionResponse
+from app.services.versions import create_branch
+from dlib.auth import AuthenticatedUser
+
+
+router = APIRouter(prefix="/versions", tags=["versions"])
+
+
+@router.post("/branches", response_model=VersionResponse)
+async def create_version_branch(
+    payload: BranchCreateRequest,
+    session: AsyncSession = Depends(get_db),
+    user: AuthenticatedUser = Depends(get_current_user),
+):
+    version = await create_branch(
+        session,
+        owner_id=user.sub,
+        parent_version_id=payload.parent_version_id,
+        branch_name=payload.branch_name,
+        version_label=payload.version_label,
+        patches=payload.patches,
+    )
+    if not version:
+        raise HTTPException(status_code=404, detail="Parent version not found")
+    return VersionResponse.model_validate(version)