chore: import upstream snapshot with attribution

docker/docker-compose.yml

@@ -0,0 +1,50 @@
+name: freecodecamp-local
+
+services:
+  db:
+    image: mongo:8.2
+    container_name: mongodb
+    command: mongod --replSet rs0
+    restart: unless-stopped
+    hostname: mongodb
+    ports:
+      - 27017:27017
+    volumes:
+      - db-data:/data/db
+    healthcheck:
+      test: ['CMD', 'mongosh', '--eval', "db.adminCommand('ping')"]
+      interval: 2s
+      retries: 5
+
+  setup:
+    image: mongo:8.2
+    depends_on:
+      db:
+        condition: service_healthy
+    restart: on-failure
+    # This will try to initiate the replica set, until it succeeds twice (i.e. until the replica set is already initialized)
+    command: >
+      mongosh --host mongodb:27017 --eval '
+        var cfg = {
+          _id: "rs0",
+          members: [
+            { _id: 0, host: "mongodb:27017" }
+          ]
+        };
+        try {
+          rs.initiate(cfg);
+        } catch (err) {
+          if(err.codeName !== "AlreadyInitialized") throw err;
+        }
+      '
+
+  mailpit:
+    restart: unless-stopped
+    image: axllent/mailpit
+    ports:
+      - '1025:1025'
+      - '8025:8025'
+
+volumes:
+  db-data:
+    driver: local