Update dockerfile to reflect new project structure

Dockerfile

@@ -2,11 +2,10 @@ FROM docker.io/library/rust:1.60-alpine as builder
 WORKDIR /app/
 RUN apk update && apk add --no-cache musl-dev
 COPY Cargo.toml Cargo.lock ./
-COPY blog_server/ ./blog_server/
-COPY utils/ ./utils/
+COPY src/ ./src/
 RUN cargo build --release
 
 FROM docker.io/library/alpine:latest as runtime
 COPY --from=builder /app/target/release/blog_server /usr/local/bin/blog_server
 ENTRYPOINT ["/usr/local/bin/blog_server"]
-CMD ["/etc/blog/config.kdl"]
+CMD ["/etc/blog/config.toml"]