Speed up devcontainer build

#144

.devcontainer/Dockerfile

@@ -1,4 +1,7 @@
 FROM mcr.microsoft.com/devcontainers/jekyll:2-bullseye
+LABEL org.opencontainers.image.source https://github.com/oleksis/blackpythondevs.com
+LABEL org.opencontainers.image.description "Black Python Developers website."
+
 ARG PYTHON_VERSION="3.11.6"
 ENV VERSION=${PYTHON_VERSION}
 
@@ -13,3 +16,5 @@ RUN /usr/local/python/${PYTHON_VERSION}/bin/python3 -m pip install --no-cache-di
     && /usr/local/python/${PYTHON_VERSION}/bin/python3 -m playwright install --with-deps
 
 COPY --chmod=0755 .devcontainer/post-create-bpdevs.sh /usr/local/post-create-bpdevs.sh
+
+EXPOSE 4000/tcp

.devcontainer/codespaces/devcontainer.json

@@ -0,0 +1,34 @@
+{
+  "name": "BPDevs",
+  "image": "ghcr.io/oleksis/blackpythondevs.com:latest",
+  "prebuild": true,
+  "prebuildCommand": "bundle install",
+  "prebuildVariants": [
+    {
+      "name": "development",
+      "prebuildCommand": "bundle install && JEKYLL_ENV=development bundle exec jekyll build"
+    }
+  ],
+
+  "appPort": "4000:4000",
+  "forwardPorts": [
+    // Jekyll server
+    4000,
+    // Live reload server
+    35729
+  ],
+
+  // Uncomment the next line to run commands after the container is created.
+  // git config --global --add safe.directory /workspaces/blackpythondevs.github.io
+  "postCreateCommand": "sh /usr/local/post-create-bpdevs.sh",
+
+  // Configure tool-specific properties.
+  "customizations": {
+    "vscode": {
+      "extensions": ["DavidAnson.vscode-markdownlint"]
+    }
+  },
+
+  // Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
+  "remoteUser": "root"
+}

.devcontainer/devcontainer.json

@@ -6,6 +6,7 @@
   // "image": "mcr.microsoft.com/devcontainers/jekyll:2-bullseye",
   "build": {
     "dockerfile": "Dockerfile",
+    "cacheFrom": "ghcr.io/oleksis/blackpythondevs.com:latest",
     "context": ".."
   },