refactor: enhance Dockerfile for improved dependency management and c…

…ross-compilation

Dockerfile

@@ -2,7 +2,7 @@
 FROM rust:latest
 
 # Install bash if it's not included by default in the slim image
-RUN apt-get update && apt-get install -y bash  && rm -rf /var/lib/apt/lists/*
+RUN apt-get update && apt-get install -y bash && rm -rf /var/lib/apt/lists/*
 
 # Set target for cross-compilation
 ENV CARGO_BUILD_TARGET=x86_64-unknown-linux-gnu
@@ -20,34 +20,44 @@ COPY entity_api/Cargo.toml entity_api/Cargo.toml
 COPY entity/Cargo.toml entity/Cargo.toml
 COPY migration/Cargo.toml migration/Cargo.toml
 
-# Create a dummy main.rs file to build dependencies
+# Create a dummy main.rs file for the root crate to build dependencies
 RUN mkdir src && echo "fn main() {}" > src/main.rs
 
-# Build the dependencies and cache them then remove the dummy main.rs
-RUN cargo build --release && rm -f target/release/deps/refactor_platform_rs*
-
-# Copy the source code to the container
+# Create dummy main.rs files for each sub-crate to build dependencies
+RUN mkdir -p entity/src && echo "fn main() {}" > entity/src/main.rs && \
+    mkdir -p entity_api/src && echo "fn main() {}" > entity_api/src/main.rs && \
+    mkdir -p service/src && echo "fn main() {}" > service/src/main.rs && \
+    mkdir -p web/src && echo "fn main() {}" > web/src/main.rs && \
+    mkdir -p migration/src && echo "fn main() {}" > migration/src/main.rs
+
+# Build the dependencies and cache them, then remove the dummy main.rs files
+RUN cargo build --release && \
+    rm -f src/main.rs \
+    entity/src/main.rs \
+    entity_api/src/main.rs \
+    service/src/main.rs \
+    web/src/main.rs \
+    migration/src/main.rs
+
+# Copy the full source code into the container
 COPY . .
 
 # Install the necessary target for cross-compilation
 RUN rustup target add $CARGO_BUILD_TARGET
 
-# Build the application in release mode
-RUN cargo build --release --target $CARGO_BUILD_TARGET
-
-# Build the actual application
+# Build the application in release mode for the specified target
 RUN cargo build --release --target $CARGO_BUILD_TARGET
 
 # Expose the port the web server will listen on
 EXPOSE 4000
 
-# Create appuser
+# Create a non-root user for running the application
 RUN useradd -m appuser
 
-# Set permissions
-RUN chown -R appuser:appuser /app && chmod +x /app/*
+# Set ownership and permissions for the application directory
+RUN chown -R appuser:appuser /usr/src/app && chmod +x /usr/src/app/target/release/*
 
-# Switch to the appuser
+# Switch to the non-root user
 USER appuser
 
 # Default to an interactive bash shell when the container starts if no command is specified