update Dockerfiles to remove the warnings

Signed-off-by: Fedor Partanskiy <[email protected]>

Author: pfi79

images/baseos/Dockerfile

@@ -19,7 +19,7 @@
 ARG GO_VER
 ARG UBUNTU_VER
 
-FROM ubuntu:${UBUNTU_VER} as base
+FROM ubuntu:${UBUNTU_VER} AS base
 
 RUN apt update && apt install -y \
     tzdata

images/orderer/Dockerfile

@@ -21,7 +21,7 @@
 ###############################################################################
 
 ARG UBUNTU_VER
-FROM ubuntu:${UBUNTU_VER} as builder
+FROM ubuntu:${UBUNTU_VER} AS builder
 
 ARG TARGETARCH
 ARG TARGETOS
@@ -57,8 +57,8 @@ ARG FABRIC_VER
 # - docker run --rm debian:stretch grep '^hosts:' /etc/nsswitch.conf
 RUN echo 'hosts: files dns' > /etc/nsswitch.conf
 
-ENV     FABRIC_CFG_PATH /etc/hyperledger/fabric
-ENV     FABRIC_VER      ${FABRIC_VER}
+ENV FABRIC_CFG_PATH=/etc/hyperledger/fabric
+ENV FABRIC_VER=${FABRIC_VER}
 
 COPY    --from=builder  build/bin/orderer           /usr/local/bin
 COPY    --from=builder  sampleconfig/msp            ${FABRIC_CFG_PATH}/msp

images/peer/Dockerfile

@@ -21,7 +21,7 @@
 ###############################################################################
 
 ARG UBUNTU_VER
-FROM ubuntu:${UBUNTU_VER} as builder
+FROM ubuntu:${UBUNTU_VER} AS builder
 
 ARG TARGETARCH
 ARG TARGETOS
@@ -60,8 +60,8 @@ ARG FABRIC_VER
 # - docker run --rm debian:stretch grep '^hosts:' /etc/nsswitch.conf
 RUN echo 'hosts: files dns' > /etc/nsswitch.conf
 
-ENV     FABRIC_CFG_PATH /etc/hyperledger/fabric
-ENV     FABRIC_VER      ${FABRIC_VER}
+ENV FABRIC_CFG_PATH=/etc/hyperledger/fabric
+ENV FABRIC_VER=${FABRIC_VER}
 
 COPY    --from=builder  build/bin/peer          /usr/local/bin
 COPY    --from=builder  sampleconfig/msp        ${FABRIC_CFG_PATH}/msp