wrangler.jsonc

{
  "name": "fmw-preview",
  "main": "src/index.ts",
  "compatibility_date": "2026-07-01",
  "compatibility_flags": ["nodejs_compat"],
  "vars": {
    "FACTORIO_VERSION": "2.1.12",
    "MONTHLY_RENDER_BUDGET": "5000",
    "ALLOWED_ORIGIN": "https://map.factorygamefan.com",
  },
  "containers": [
    {
      "class_name": "PreviewContainer",
      "image": "../container/Dockerfile",
      // Memory is billed on PROVISIONED size for the whole time an instance is
      // awake, not on what the process touches - so instance_type is the single
      // biggest cost lever here, and it was 4x oversized. Measured over 20 days
      // of production (containersMetricsAdaptiveGroups): peak 603 MiB, idle
      // ~205 MiB, peak disk 522 MiB. `basic` is 1 GiB / 4 GB, ~40% memory
      // headroom over the observed peak. `size` is pinned to 1024 in
      // src/schema.ts, so no request can enlarge a render past that peak.
      // Re-measure before shrinking further; the next size down is `lite`
      // (256 MiB), which the 603 MiB peak rules out.
      "instance_type": "basic",
      // The worker only ever addresses idFromName("pool-0"), so a second
      // instance is unreachable by design - but max_instances is what caps the
      // blast radius if that ever changes or an instance leaks. At 3 this bill
      // could silently triple.
      "max_instances": 1,
    },
  ],
  "durable_objects": {
    "bindings": [
      { "class_name": "PreviewContainer", "name": "PREVIEW_CONTAINER" },
      { "class_name": "RenderBudget", "name": "RENDER_BUDGET" },
    ],
  },
  "r2_buckets": [{ "binding": "PREVIEW_CACHE", "bucket_name": "fmw-preview-cache" }],
  "migrations": [{ "tag": "v1", "new_sqlite_classes": ["PreviewContainer", "RenderBudget"] }],
}