working base

Dockerfile

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+FROM rust:1.93-alpine AS builder
+
+RUN apk add --no-cache musl-dev
+
+WORKDIR /app
+
+COPY Cargo.toml Cargo.lock ./
+
+# Create dummy main.rs to cache dependencies
+RUN mkdir src && echo "fn main() {}" > src/main.rs
+RUN cargo build --release && rm -rf src
+
+COPY src ./src
+RUN cargo build --release
+
+FROM alpine:latest
+
+RUN apk add --no-cache iputils iptables
+
+WORKDIR /app
+
+COPY --from=builder /app/target/release/route-switcher .
+
+ENV RUST_LOG=info
+ENV PRIMARY_INTERFACE=eth0
+ENV SECONDARY_INTERFACE=eth1
+ENV PRIMARY_GATEWAY=192.168.1.1
+ENV SECONDARY_GATEWAY=192.168.2.1
+ENV PING_TARGET=8.8.8.8
+
+CMD ["./route-switcher"]