update Dockerfile

docker-compose/minisrv/Dockerfile

@@ -1,6 +1,7 @@
 FROM node:current-alpine
 
 RUN apk add git
+RUN npm install -g npm@latest 2>/dev/null > /dev/null
 RUN cd /opt && git clone --depth=1 https://github.com/zefie/zefie_wtvp_minisrv.git minisrv
 RUN cd /opt/minisrv && git config pull.ff only 
 RUN cd /opt/minisrv/zefie_wtvp_minisrv && npm install
@@ -10,3 +11,4 @@ RUN chmod +x /opt/minisrv/zefie_wtvp_minisrv/run.sh
 
 WORKDIR /opt/minisrv/zefie_wtvp_minisrv
 CMD ./run.sh
+