chore: fix Dockerfile now that we have lib.rs

Dockerfile

@@ -6,9 +6,13 @@ WORKDIR /usr/src/pop_imap_importer
 # Copy manifests first to leverage Docker layer caching
 COPY Cargo.* ./
 
-# Create a dummy src/main.rs file to build dependencies
-RUN mkdir -p src && \
-    echo "fn main() {}" > src/main.rs
+# Create dummy source files to build dependencies
+RUN mkdir -p src/bin && \
+    echo "fn main() {}" > src/main.rs && \
+    echo "" > src/lib.rs && \
+    echo "fn main() {}" > src/bin/normalize_imap.rs && \
+    echo "fn main() {}" > src/bin/fetch_email.rs && \
+    echo "fn main() {}" > src/bin/list_uids.rs
 
 # Build dependencies only - this will be cached as long as Cargo.toml/Cargo.lock don't change
 RUN --mount=type=cache,target=/usr/local/cargo/registry \
@@ -16,7 +20,8 @@ RUN --mount=type=cache,target=/usr/local/cargo/registry \
 
 # Copy the actual source code
 COPY src src
-RUN touch src/main.rs
+# Touch source files to force rebuild
+RUN touch src/main.rs src/lib.rs
 
 # Build the actual application
 RUN --mount=type=cache,target=/usr/local/cargo/registry \
@@ -32,7 +37,7 @@ RUN apt-get update && \
     rm -rf /var/lib/apt/lists/*
 
 # RUN apt-get update && apt-get install -y extra-runtime-dependencies && rm -rf /var/lib/apt/lists/*
-COPY --from=builder /usr/src/pop_imap_importer/target/release/rs_pop_imap_importer /usr/local/bin/pop_imap_importer
+COPY --from=builder /usr/src/pop_imap_importer/target/release/pop-to-imap /usr/local/bin/pop_imap_importer
 
 CMD ["pop_imap_importer"]