feat: add diesel migration support in Dockerfile

Dockerfile

@@ -1,26 +1,32 @@
+######################################-Variables-##########################################
 # version can be latest or specific like 1.73.0
 ARG RUST_VERSION=latest
 ARG APP_NAME="unknown"
 ARG PORT=5001
 
+######################################-Chef-##########################################
 # We only pay the installation cost once,
 # it will be cached from the second build onwards
-FROM rust:${RUST_VERSION} as chef
+FROM rust:${RUST_VERSION}-slim as chef
 
 WORKDIR /app
 
+RUN apt update && apt upgrade --no-install-recommends -y && \
+    apt install --no-install-recommends pkg-config libssl-dev libpq-dev -y
+
 # Install diesel CLI for migration
 RUN cargo install diesel_cli --no-default-features --features postgres
 # Install cargo-chef for Docker layer caching
 RUN cargo install cargo-chef
 
+######################################-Planner-##########################################
 FROM chef as planner
 
 COPY . .
 
 RUN cargo chef prepare  --recipe-path recipe.json
 
-
+######################################-Cacher-##########################################
 # Build the application. Leverage a cache to which will speed up subsequent builds.
 FROM chef as builder
 
@@ -32,7 +38,14 @@ COPY . .
 
 RUN cargo build --release
 
-################################################################################
+######################################-Migration-##########################################
+# If your service have db connection and required to perform a db migration then
+# use this section, otherwise coment it out.
+FROM builder as migration
+
+CMD ["diesel", "migration", "run"]
+
+######################################-Application-##########################################
 # Create a new stage for running the application that contains the minimal
 # runtime dependencies for the application. This often uses a different base
 # image from the build stage where the necessary files are copied from the build
@@ -41,8 +54,18 @@ FROM gcr.io/distroless/cc-debian12	as final
 
 WORKDIR /app
 
-# install required packges (failing, distroless does not have a packges manager)
-# RUN apt update && apt install -y openssl libpq-dev pkg-config
+# Create a non-privileged user that the app will run under.
+# See https://docs.docker.com/develop/develop-images/dockerfile_best-practices/#user
+ARG UID=10001
+RUN adduser \
+    --disabled-password \
+    --gecos "" \
+    --home "/nonexistent" \
+    --shell "/sbin/nologin" \
+    --no-create-home \
+    --uid "${UID}" \
+    appuser
+USER appuser
 
 COPY --from=builder /app/.env /app/.env
 COPY --from=builder /app/target/release/${APP_NAME} /app/${APP_NAME}
@@ -53,3 +76,5 @@ EXPOSE ${PORT}
 # What the container should run when it is started.
 # CMD ["bash", "-c", "./author diesel migration run && ./author"]
 CMD ["${APP_NAME}"]
+
+#------------------------------------------End-----------------------------------------------