chore(server): dockerfile multi-stage e dockerignore para deploy Coolify

server/.dockerignore

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+target/
+data/
+*.db
+.git/
+tests/

server/Dockerfile

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+FROM rust:1.85-alpine AS builder
+WORKDIR /build
+RUN apk add --no-cache musl-dev build-base
+COPY Cargo.toml ./
+COPY Cargo.lock ./
+COPY src ./src
+RUN cargo build --release
+
+FROM alpine:3.20
+RUN apk add --no-cache ca-certificates tzdata
+WORKDIR /app
+COPY --from=builder /build/target/release/ares-server /app/ares-server
+ENV ARS_NEXT_HOST=0.0.0.0
+ENV ARS_NEXT_PORT=3000
+EXPOSE 3000
+VOLUME ["/data"]
+CMD ["/app/ares-server"]