Split streaming server from web server (#24702)

streaming/package.json

@@ -0,0 +1,39 @@
+{
+  "name": "@mastodon/streaming",
+  "license": "AGPL-3.0-or-later",
+  "packageManager": "yarn@4.0.1",
+  "engines": {
+    "node": ">=18"
+  },
+  "description": "Mastodon's Streaming Server",
+  "private": true,
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/mastodon/mastodon.git"
+  },
+  "scripts": {
+    "start": "node ./index.js"
+  },
+  "dependencies": {
+    "dotenv": "^16.0.3",
+    "express": "^4.18.2",
+    "ioredis": "^5.3.2",
+    "jsdom": "^22.1.0",
+    "npmlog": "^7.0.1",
+    "pg": "^8.5.0",
+    "pg-connection-string": "^2.6.0",
+    "prom-client": "^15.0.0",
+    "uuid": "^9.0.0",
+    "ws": "^8.12.1"
+  },
+  "devDependencies": {
+    "@types/express": "^4.17.17",
+    "@types/npmlog": "^4.1.4",
+    "@types/pg": "^8.6.6",
+    "@types/uuid": "^9.0.0"
+  },
+  "optionalDependencies": {
+    "bufferutil": "^4.0.7",
+    "utf-8-validate": "^6.0.3"
+  }
+}