# The Meme Protocol

Small self-hosted meme gallery matching the `stitch_the_meme_protocol` desktop mockup direction.

## Run locally

```sh
npm start
```

The server listens on `http://localhost:8080` by default.

## Configuration

- `PORT`: HTTP port, default `8080`
- `HOST`: bind address, default `0.0.0.0`
- `DATA_DIR`: disk storage root, default `./data`
- `SITE_URL`: public canonical site URL used for SEO metadata, sitemaps, feeds, `llms.txt`, OpenAPI servers, and API skill instructions. Production should use `https://bitsforfree.com`.
- `SEED_DEMO_MEMES`: set to `false` to disable generated demo memes on first boot
- `ADMIN_TOKEN`: secret review URL token. If omitted, one is generated at boot and printed in server logs.
- `OPENAI_API_KEY`: enables AI upload moderation. Without it, uploads are queued for admin review.
- `OPENAI_MODERATION_MODEL`: moderation vision model, default `gpt-4o-mini`
- `TRUST_PROXY`: set to `true` when running behind a trusted reverse proxy so upload limits use `X-Forwarded-For`

Uploads accept PNG and JPEG images. The server rejects files over 5 MB, any image edge over `6000px`, and images over 20 million pixels. Accepted uploads are decoded, metadata-stripped, resized so the longest edge is at most `1600px`, and stored as WebP.
Upload caps are 5 per hour per IP, 10 per day per IP, and 100 globally per day. AI-approved uploads publish immediately; ambiguous uploads are queued for the secret admin review page; likely illegal uploads are rejected immediately.

Files are stored under sharded date/hash paths:

```text
data/
  index/memes.jsonl
  memes/YYYY/MM/DD/aa/bb/<sha256>.<ext>
  meta/YYYY/MM/DD/aa/bb/<sha256>.json
```

## Discovery Metadata

The app serves crawler and answer-engine metadata without adding visible page copy:

- `/openapi.json`
- `/meme-api.skill.md`
- `/robots.txt`
- `/sitemap.xml` with the home page and approved meme URLs
- `/feed.json`
- `/llms.txt`
- `/site.webmanifest`
- Open Graph, Twitter card, canonical, and JSON-LD metadata on `/`

Set `SITE_URL` in production so canonical and API discovery URLs use the public domain instead of an internal proxy hostname. The server loads `.env` at startup when present, while real environment variables still take precedence.

## Public API

- `GET /api/memes?page=1&pageSize=12`: lists approved memes only. `pageSize` is capped at `48`.
- `GET /api/memes/<sha256>`: returns public metadata for one approved meme.
- `GET /media/<sha256>`: returns the normalized WebP image for one approved meme.
- `POST /api/memes`: submits one PNG/JPEG upload as `multipart/form-data` with a file field named `meme`.

API uploads use the exact same path as the browser form: persistent IP upload quotas, file size checks, image dimension and pixel checks, metadata-stripping WebP normalization, AI moderation, and admin-review queueing. A published upload returns `201`; a queued upload returns `202`; moderation rejection returns `422`.

Public API reads are rate-limited per IP and return `429` with `Retry-After` when exceeded. List and metadata responses include `RateLimit-*` headers and a `rateLimit` object.

## Docker

```sh
docker build -t meme-protocol .
docker run --rm -p 8080:8080 -v meme-protocol-data:/data meme-protocol
```

For production, copy `.env.example` to `.env`, set real secrets, then run:

```sh
docker compose up -d --build
```

The included compose file binds the app to `127.0.0.1:18080` on the host so a reverse proxy can publish it without exposing the Node container directly.

### Production Build Note

On the production host used for this project, npm registry downloads from inside Docker timed out unless `registry.npmjs.org` was pinned to a known-good IPv4 address during build. The proven build command is:

```sh
sudo docker build \
  --network=host \
  --add-host registry.npmjs.org:104.16.1.34 \
  -t meme-protocol:latest .
```

Then start with the already-built image:

```sh
sudo docker compose up -d --no-build
```

If the registry IP ever stops working, resolve and test another IPv4 address for `registry.npmjs.org`, then replace `104.16.1.34` in the build command.

When using a host-mounted data directory, the container writes as UID/GID `10001:10001`:

```sh
sudo mkdir -p ./data
sudo chown -R 10001:10001 ./data
sudo chmod -R u+rwX,g+rwX,o-rwx ./data
```