Only touch *.rs under src

To avoid having to rebuild dependencies (and thus also all their dependents) with generated `.rs` files, we have to avoid touching `.rs` files under `target`.

Author: ilyvion

Dockerfile

@@ -38,7 +38,7 @@ RUN cargo build --release
 RUN rm -rf /tmp/source/src
 COPY src /tmp/source/src
 COPY migrations /tmp/source/migrations
-RUN find -name "*.rs" -exec touch {} \; && cargo build --release
+RUN find src -name "*.rs" -exec touch {} \; && cargo build --release
 
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