react-rust-postgres: add connection to postgres with migrations

Signed-off-by: Jérémie Drouet <jeremie.drouet@gmail.com>

react-rust-postgres/backend/Dockerfile

@@ -1,7 +1,12 @@
 FROM jdrouet/rust-nightly:buster-slim AS base
 
+RUN apt-get update \
+  && apt-get install -y libpq-dev \
+  && rm -rf /var/lib/apt/lists/*
+
 ENV USER=root
 ENV ROCKET_ADDRESS=0.0.0.0
+ENV ROCKET_ENV=development
 
 WORKDIR /code
 RUN cargo init
@@ -21,6 +26,8 @@ RUN cargo build --release --offline
 
 FROM debian:buster-slim
 
+ENV ROCKET_ENV=production
+
 EXPOSE 8000
 
 COPY --from=builder /code/target/release/react-rust-postgres /react-rust-postgres