Removed /v1/ prefix from Haskell source code. Optimised backend image. Added newlines to frontend.

backend/Dockerfile

@@ -1,4 +1,4 @@
-FROM haskell:8
+FROM haskell:8 as build
 WORKDIR /opt/backend
 RUN apt-get update
 RUN yes | apt-get install postgresql libpq-dev
@@ -7,4 +7,9 @@ COPY ./backend.cabal /opt/backend
 RUN cabal build --only-dependencies -j4
 COPY . /opt/backend
 RUN cabal install
-CMD ["backend"]
+
+FROM debian:buster
+RUN apt-get update
+RUN yes | apt-get install postgresql libpq-dev
+COPY --from=build /root/.cabal/bin/backend ./
+CMD ["./backend"]