- update: Dockerfile layer reordering to speed up build times and lower image space needed

- add: .dockerignore file to reduce file transfers and remove unneeded files in image

auth-service/Dockerfile

@@ -1,17 +1,19 @@
-# Use Rust official image for building the application
-FROM rust:1.83 AS builder
+FROM rust:1.83-slim-bookworm AS builder
 LABEL authors="raven"
 
-WORKDIR /usr/src/proto
-COPY ./proto .
-
-WORKDIR /usr/src/utils
-COPY ./utils .
-
 RUN apt-get update \
  && DEBIAN_FRONTEND=noninteractive \
     apt-get install --no-install-recommends --assume-yes \
-      protobuf-compiler
+    pkg-config \
+    libssl-dev \
+    protobuf-compiler \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /usr/src/utils
+COPY ./utils .
+
+WORKDIR /usr/src/proto
+COPY ./proto .
 
 # Set the working directory
 WORKDIR /usr/src/auth-service