Copy files during build

.devcontainer/Dockerfile

@@ -1,5 +1,6 @@
 FROM mcr.microsoft.com/devcontainers/python:3.11-bullseye
 RUN apt-get update && apt-get upgrade -y
 RUN pip install pip-tools invoke
+COPY requirements.in requirements.txt requirements-dev.in requirements-dev.txt constraints.txt tasks.py .pre-commit-config.yaml ./
 RUN invoke sync-dependencies
 RUN pre-commit install --install-hooks

.devcontainer/devcontainer.json

@@ -1,6 +1,7 @@
 {
   "build": {
-    "dockerfile": "Dockerfile"
+    "dockerfile": "Dockerfile",
+    "context": ".."
   },
   "postStartCommand": "inv sync-dependencies && pre-commit install --install-hooks"
 }