chore: import upstream snapshot with attribution

.devcontainer/docker-compose.yml

@@ -0,0 +1,41 @@
+services:
+  devcontainer:
+    image: ghcr.io/freecodecamp/devcontainer:latest
+    depends_on:
+      - db
+      - setup
+    volumes:
+      - ..:/workspaces/freeCodeCamp:cached
+    network_mode: service:db
+    command: sleep infinity
+
+  db:
+    image: mongo:8.2
+    command: mongod --replSet rs0
+    restart: unless-stopped
+    hostname: mongodb
+    volumes:
+      - db-data:/data/db
+    healthcheck:
+      test: ['CMD', 'mongosh', '--eval', "db.adminCommand('ping')"]
+      interval: 2s
+      retries: 5
+      start_period: 10s
+
+  setup:
+    image: mongo:8.2
+    depends_on:
+      db:
+        condition: service_healthy
+    restart: on-failure:5
+    command: >
+      mongosh --host mongodb:27017 --eval '
+        rs.initiate({
+          _id: "rs0",
+          members: [{ _id: 0, host: "mongodb:27017" }]
+        }).ok || rs.status().ok
+      '
+
+volumes:
+  db-data:
+    driver: local