move checkout back to correct place

Author: lucasaafaria

docker/bitcoin-node.dockerfile

@@ -46,10 +46,10 @@ RUN rustup component add rustfmt
 
 # Copy repository to the container and checkout to predefined commit
 RUN git clone -b $PEER_EXTRACTOR_BRANCH --single-branch $PEER_EXTRACTOR_REPO /peer-observer
-RUN git checkout $PEER_EXTRACTOR_COMMIT
 
 # Set working directory to the repository
 WORKDIR /peer-observer
+RUN git checkout $PEER_EXTRACTOR_COMMIT
 
 # Copy scripts
 COPY docker/set-bpf-environment.sh scripts/set-bpf-environment.sh