Fix devcontainer

.devcontainer/Dockerfile

@@ -4,7 +4,7 @@ FROM mcr.microsoft.com/devcontainers/python:1-3.12-bullseye
 # pv is required for asciicasts
 RUN apt-get update && apt-get install --no-install-recommends -y \
     pv=1.6.6-1+b1 \
-    subversion=1.14.1-3+deb11u1 && \
+    subversion=1.14.1-3+deb11u2 && \
     rm -rf /var/lib/apt/lists/*
 
 WORKDIR /workspaces/dfetch
@@ -20,7 +20,7 @@ ENV PYTHONUSERBASE="/home/dev/.local"
 
 COPY --chown=dev:dev . .
 
-RUN pip install --no-cache-dir --root-user-action=ignore --upgrade pip==25.0.1 \
+RUN pip install --no-cache-dir --root-user-action=ignore --upgrade pip==25.1.1 \
     && pip install --no-cache-dir --root-user-action=ignore -e .[development,docs,test,casts] \
     && pre-commit install --install-hooks
 

.github/workflows/devcontainer.yml

@@ -0,0 +1,44 @@
+name: DevContainer
+
+on:
+  push:
+    branches: [main, dev]
+  pull_request:
+    branches: [main, dev]
+
+jobs:
+  devcontainer:
+    name: DevContainer Build & Test
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Cache Docker layers
+        uses: actions/cache@v4
+        with:
+          path: /tmp/.buildx-cache
+          key: devcontainer-${{ runner.os }}-${{ github.sha }}
+          restore-keys: |
+            devcontainer-${{ runner.os }}-
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Build DevContainer image
+        uses: devcontainers/ci@v0.3
+        with:
+          runCmd: |
+            echo "Installing test dependencies..."
+            pip install -e .[development,docs,casts]
+
+            echo "Running pre-commit checks..."
+            pre-commit run --all-files
+
+            echo "Running unit tests..."
+            python -m pytest tests
+
+            echo "Building documentation..."
+            make -C doc html
+            make -C doc/landing-page html