feat: IPv6 outbound rotation via curl --interface

- Add IPv6SourcePool for round-robin IP rotation
- fetchViaCurl: Bun.spawn + curl -6 --interface for source binding
- Auto-fallback to regular fetch when IPv6 connection fails
- Response decompression via --compressed flag
- Docker + GHCR build/deploy workflows
- 8 routable IPv6 addresses on VPS

Dockerfile

@@ -0,0 +1,22 @@
+FROM oven/bun:1.3-alpine
+WORKDIR /app
+
+# Install curl for IPv6 source rotation
+RUN apk add --no-cache curl
+
+# Copy dependency manifests
+COPY package.json bun.lock* ./
+
+# Install all dependencies (no production deps)
+RUN bun install
+
+# Copy source code
+COPY src/ src/
+COPY public/ public/
+COPY proxy.txt ./
+
+EXPOSE 3000
+
+USER bun
+
+CMD ["bun", "run", "src/index.ts"]