Fix Caddy integration for reverse-proxy

tests/Complement.Dockerfile

 FROM valkum/docker-rust-ci:latest as builder
-WORKDIR /build
+WORKDIR /workdir
 
 ARG RUSTC_WRAPPER
 ARG AWS_ACCESS_KEY_ID
@@ -12,17 +12,19 @@ COPY . .
 RUN cargo build
 
 FROM valkum/docker-rust-ci:latest
-WORKDIR /build
+WORKDIR /workdir
 
 RUN curl -OL "https://github.com/caddyserver/caddy/releases/download/v2.1.1/caddy_2.1.1_linux_amd64.tar.gz"
 RUN tar xzf caddy_2.1.1_linux_amd64.tar.gz
 
-COPY --from=builder /build/target/debug/conduit /conduit
+COPY --from=builder /workdir/target/debug/conduit /workdir/conduit
 
-ENV SERVER_NAME=localhost
 COPY Rocket-example.toml Rocket.toml
-RUN sed -i "s/server_name: your.server.name/server_name: ${SERVER_NAME}/g" Rocket.toml
-RUN sed -i "s/port = 14004/port: 8008/g" Rocket.toml
+
+ENV SERVER_NAME=localhost
+
+RUN sed -i "s/server_name = \"your.server.name\"/server_name = \"${SERVER_NAME}\"/g" Rocket.toml
+RUN sed -i "s/port = 14004/port = 8008/g" Rocket.toml
 
 EXPOSE 8008 8448
-CMD caddy --from 8448 --to localhost:8008 & && /conduit
\ No newline at end of file
+CMD /workdir/caddy reverse-proxy --from ${SERVER_NAME}:8448 --to localhost:8008 > /dev/null 2>&1 & /workdir/conduit
\ No newline at end of file