Create Dockerfile

Dockerfile

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+FROM rust:1.78-slim AS builder
+WORKDIR /app
+COPY Cargo.toml .
+RUN mkdir src && echo 'fn main() {}' > src/main.rs && \
+    cargo build --release && \
+    rm -rf src
+COPY . .
+RUN cargo build --release --locked
+
+FROM debian:bookworm-slim
+RUN apt-get update && apt-get install -y ca-certificates && rm -rf /var/lib/apt/lists/*
+WORKDIR /app
+COPY --from=builder /app/target/release/puter-chat-web .
+COPY static ./static
+ENV PORT=7860
+EXPOSE 7860
+CMD ["./puter-chat-web"]