chore: add Dockerfile (#3)

* feat: add Dockerfile

* chore: expose port in Dockerfile

* chore: divide build and run stage

* chore: Dockerfile nits

---------

Co-authored-by: Bufo <bufo24@users.noreply.github.com>

Dockerfile

@@ -0,0 +1,22 @@
+FROM rust:1.79 AS builder
+
+WORKDIR /app
+
+COPY ./ ./
+
+RUN cargo build --release
+
+FROM debian:bookworm-slim
+
+RUN apt-get update && \
+  apt-get upgrade && \
+  apt-get install -y libsqlite3-0 libpq5 ca-certificates && \
+  apt-get clean all && \
+  rm -rf /var/lib/apt/lists/*
+
+COPY --from=builder /app/target/release/covclaim /usr/local/bin/covclaim
+COPY --from=builder /app/.env /.env
+
+EXPOSE 1234
+
+CMD ["/usr/local/bin/covclaim"]