merge with upstream

Author: sheilaschoepp

.all-contributorsrc

@@ -15,14 +15,14 @@
       "login": "alshedivat",
       "name": "Maruan",
       "avatar_url": "https://avatars.githubusercontent.com/u/2126561?v=4",
-      "profile": "http://maruan.alshedivat.com",
+      "profile": "https://maruan.alshedivat.com",
       "contributions": ["design", "code"]
     },
     {
       "login": "rohandebsarkar",
       "name": "Rohan Deb Sarkar",
       "avatar_url": "https://avatars.githubusercontent.com/u/50144004?v=4",
-      "profile": "http://rohandebsarkar.github.io",
+      "profile": "https://rohandebsarkar.github.io",
       "contributions": ["code"]
     },
     {

.devcontainer/Dockerfile

@@ -0,0 +1,7 @@
+FROM mcr.microsoft.com/devcontainers/jekyll
+
+# Fix: Remove the broken Yarn repository from the apt sources.
+# This prevents 'apt-get update' from failing due to the missing GPG key.
+# (Yarn is already provided by the dev container features/nvm, so this system repo is unnecessary)
+# See issue #3487
+RUN rm -f /etc/apt/sources.list.d/yarn.list

.devcontainer/devcontainer.json

@@ -2,7 +2,10 @@
 // README at: https://github.com/devcontainers/templates/tree/main/src/jekyll
 {
   "name": "Jekyll",
-  "image": "mcr.microsoft.com/devcontainers/jekyll",
+  // Using a Dockerfile to fix the broken Yarn repository. See issue #3487.
+  "build": {
+    "dockerfile": "Dockerfile"
+  },
 
   // Features to add to the dev container. More info: https://containers.dev/features.
   "features": {