ci: fix error on install truffle

docker/Dockerfile.truffle

@@ -7,10 +7,7 @@ RUN git clone https://github.com/binance-chain/canonical-upgradeable-bep20.git /
 WORKDIR /usr/app/canonical-upgradeable-bep20
 COPY docker/truffle-config.js /usr/app/canonical-upgradeable-bep20
 
-RUN npm install -g n
-RUN n 12.18.3 && node -v
-
-RUN npm install -g truffle@v5.1.14
+RUN npm install -g --unsafe-perm truffle@v5.1.14
 RUN npm install
 
 ENTRYPOINT [ "/bin/bash" ]