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dockerfile

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+# Use the official Bun image
+FROM oven/bun:1 AS base
+WORKDIR /usr/src/app
+
+# Install dependencies into temp directories
+# This will cache them and speed up future builds
+FROM base AS install
+
+# Install dependencies for both backend and frontend
+COPY backend/package.json backend/bun.lockb /temp/dev/backend/
+COPY frontend/package.json frontend/bun.lockb /temp/dev/frontend/
+
+RUN cd /temp/dev/backend && bun install
+RUN cd /temp/dev/frontend && bun install
+
+# Install with --production (exclude devDependencies)
+RUN mkdir -p /temp/prod/backend /temp/prod/frontend
+COPY backend/package.json backend/bun.lockb /temp/prod/backend/
+COPY frontend/package.json frontend/bun.lockb /temp/prod/frontend/
+
+RUN cd /temp/prod/backend && bun install
+RUN cd /temp/prod/frontend && bun install
+
+# Build the frontend project
+FROM install AS build-frontend
+WORKDIR /usr/src/app/frontend
+COPY --from=install /temp/dev/frontend/node_modules node_modules
+COPY frontend/ .
+RUN bun run build
+
+# Prepare for final release
+FROM base AS release
+WORKDIR /usr/src/app
+
+# Copy production dependencies
+COPY --from=install /temp/prod/backend/node_modules backend/node_modules
+COPY --from=install /temp/prod/frontend/node_modules frontend/node_modules
+
+# Copy backend source code
+COPY backend/ backend/
+
+# Copy the built frontend assets into the backend public directory
+COPY --from=build-frontend /usr/src/app/frontend/dist backend/public
+
+# Set the entrypoint to run the backend server
+USER bun
+EXPOSE 3000/tcp
+ENTRYPOINT [ "bun", "run", "backend/src/server.ts" ]