refactor(docker): split browser image into per-core prebuilt variants

Replace the single browser image (which required local build) with three
prebuilt images: browser-chromium, browser-firefox, and browser (both).
Each is exposed as a separate Docker Compose profile so users can simply
`docker compose --profile browser-chromium up -d` without any local build
step, significantly reducing install time.

docker/Dockerfile.browser

@@ -17,8 +17,7 @@ RUN cd apps/browser && bun run build
 
 FROM ubuntu:noble
 
-ARG BROWSER_CORES=chromium,firefox
-ENV BROWSER_CORES=$BROWSER_CORES
+ENV BROWSER_CORES=chromium,firefox
 
 WORKDIR /app
 

docker/Dockerfile.browser-chromium

@@ -0,0 +1,41 @@
+# syntax=docker/dockerfile:1
+FROM --platform=$BUILDPLATFORM oven/bun:1 AS builder
+
+WORKDIR /build
+
+COPY apps/browser/package.json apps/browser/bun.lock* ./apps/browser/
+COPY packages/config/package.json ./packages/config/package.json
+
+RUN echo '{"name":"@memohai/monorepo","private":true,"workspaces":["apps/*","packages/*"]}' > package.json
+
+RUN cd apps/browser && bun install
+
+COPY packages/config/ ./packages/config/
+COPY apps/browser/ ./apps/browser/
+
+RUN cd apps/browser && bun run build
+
+FROM ubuntu:noble
+
+ENV BROWSER_CORES=chromium
+
+WORKDIR /app
+
+RUN apt-get update && apt-get install -y unzip curl && \
+    curl -fsSL https://bun.sh/install | bash && \
+    ln -s /root/.bun/bin/bun /usr/local/bin/bun && \
+    apt-get clean && rm -rf /var/lib/apt/lists/*
+
+COPY --from=builder /build/apps/browser/dist /app/dist
+COPY --from=builder /build/apps/browser/node_modules /app/node_modules
+COPY --from=builder /build/apps/browser/package.json /app/package.json
+COPY --from=builder /build/node_modules /node_modules
+
+RUN bun /app/node_modules/.bin/playwright install --with-deps chromium
+
+EXPOSE 8083
+
+HEALTHCHECK --interval=30s --timeout=3s --start-period=10s --retries=3 \
+    CMD curl -sf http://127.0.0.1:8083/health || exit 1
+
+CMD ["bun", "run", "dist/index.js"]

docker/Dockerfile.browser-firefox

@@ -0,0 +1,41 @@
+# syntax=docker/dockerfile:1
+FROM --platform=$BUILDPLATFORM oven/bun:1 AS builder
+
+WORKDIR /build
+
+COPY apps/browser/package.json apps/browser/bun.lock* ./apps/browser/
+COPY packages/config/package.json ./packages/config/package.json
+
+RUN echo '{"name":"@memohai/monorepo","private":true,"workspaces":["apps/*","packages/*"]}' > package.json
+
+RUN cd apps/browser && bun install
+
+COPY packages/config/ ./packages/config/
+COPY apps/browser/ ./apps/browser/
+
+RUN cd apps/browser && bun run build
+
+FROM ubuntu:noble
+
+ENV BROWSER_CORES=firefox
+
+WORKDIR /app
+
+RUN apt-get update && apt-get install -y unzip curl && \
+    curl -fsSL https://bun.sh/install | bash && \
+    ln -s /root/.bun/bin/bun /usr/local/bin/bun && \
+    apt-get clean && rm -rf /var/lib/apt/lists/*
+
+COPY --from=builder /build/apps/browser/dist /app/dist
+COPY --from=builder /build/apps/browser/node_modules /app/node_modules
+COPY --from=builder /build/apps/browser/package.json /app/package.json
+COPY --from=builder /build/node_modules /node_modules
+
+RUN bun /app/node_modules/.bin/playwright install --with-deps firefox
+
+EXPOSE 8083
+
+HEALTHCHECK --interval=30s --timeout=3s --start-period=10s --retries=3 \
+    CMD curl -sf http://127.0.0.1:8083/health || exit 1
+
+CMD ["bun", "run", "dist/index.js"]

docker/docker-compose.cn.yml

@@ -10,4 +10,8 @@ services:
   web:
     image: memoh.cn/memohai/web:latest
   browser:
-    image: memoh.cn/memohai/browser:latest
+    image: memoh.cn/memohai/browser:latest
+  browser-chromium:
+    image: memoh.cn/memohai/browser-chromium:latest
+  browser-firefox:
+    image: memoh.cn/memohai/browser-firefox:latest