chore: format Dockerfile

Dockerfile

@@ -23,32 +23,32 @@ ENV NODE_VERSION 10.15.1
 
 RUN ARCH= && dpkgArch="$(dpkg --print-architecture)" \
   && case "${dpkgArch##*-}" in \
-    amd64) ARCH='x64';; \
-    ppc64el) ARCH='ppc64le';; \
-    s390x) ARCH='s390x';; \
-    arm64) ARCH='arm64';; \
-    armhf) ARCH='armv7l';; \
-    i386) ARCH='x86';; \
-    *) echo "unsupported architecture"; exit 1 ;; \
+  amd64) ARCH='x64';; \
+  ppc64el) ARCH='ppc64le';; \
+  s390x) ARCH='s390x';; \
+  arm64) ARCH='arm64';; \
+  armhf) ARCH='armv7l';; \
+  i386) ARCH='x86';; \
+  *) echo "unsupported architecture"; exit 1 ;; \
   esac \
   # gpg keys listed at https://github.com/nodejs/node#release-keys
   && set -ex \
   && for key in \
-    94AE36675C464D64BAFA68DD7434390BDBE9B9C5 \
-    FD3A5288F042B6850C66B31F09FE44734EB7990E \
-    71DCFD284A79C3B38668286BC97EC7A07EDE3FC1 \
-    DD8F2338BAE7501E3DD5AC78C273792F7D83545D \
-    C4F0DFFF4E8C1A8236409D08E73BC641CC11F4C8 \
-    B9AE9905FFD7803F25714661B63B535A4C206CA9 \
-    77984A986EBC2AA786BC0F66B01FBB92821C587A \
-    8FCCA13FEF1D0C2E91008E09770F7A9A5AE15600 \
-    4ED778F539E3634C779C87C6D7062848A1AB005C \
-    A48C2BEE680E841632CD4E44F07496B3EB3C1762 \
-    B9E2F5981AA6E0CD28160D9FF13993A75599653C \
+  94AE36675C464D64BAFA68DD7434390BDBE9B9C5 \
+  FD3A5288F042B6850C66B31F09FE44734EB7990E \
+  71DCFD284A79C3B38668286BC97EC7A07EDE3FC1 \
+  DD8F2338BAE7501E3DD5AC78C273792F7D83545D \
+  C4F0DFFF4E8C1A8236409D08E73BC641CC11F4C8 \
+  B9AE9905FFD7803F25714661B63B535A4C206CA9 \
+  77984A986EBC2AA786BC0F66B01FBB92821C587A \
+  8FCCA13FEF1D0C2E91008E09770F7A9A5AE15600 \
+  4ED778F539E3634C779C87C6D7062848A1AB005C \
+  A48C2BEE680E841632CD4E44F07496B3EB3C1762 \
+  B9E2F5981AA6E0CD28160D9FF13993A75599653C \
   ; do \
-    gpg --batch --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys "$key" || \
-    gpg --batch --keyserver hkp://ipv4.pool.sks-keyservers.net --recv-keys "$key" || \
-    gpg --batch --keyserver hkp://pgp.mit.edu:80 --recv-keys "$key" ; \
+  gpg --batch --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys "$key" || \
+  gpg --batch --keyserver hkp://ipv4.pool.sks-keyservers.net --recv-keys "$key" || \
+  gpg --batch --keyserver hkp://pgp.mit.edu:80 --recv-keys "$key" ; \
   done \
   && curl -fsSLO --compressed "https://nodejs.org/dist/v$NODE_VERSION/node-v$NODE_VERSION-linux-$ARCH.tar.xz" \
   && curl -fsSLO --compressed "https://nodejs.org/dist/v$NODE_VERSION/SHASUMS256.txt.asc" \
@@ -77,9 +77,9 @@ RUN apt-get update && apt-get install -y bzr && apt-get clean
 ENV GOLANG_VERSION 1.12
 
 RUN wget -q -O go.tgz "https://golang.org/dl/go${GOLANG_VERSION}.linux-amd64.tar.gz" && \
-	tar -C /usr/local -xzf go.tgz && \
-	rm go.tgz && \
-	export PATH="/usr/local/go/bin:$PATH"
+  tar -C /usr/local -xzf go.tgz && \
+  rm go.tgz && \
+  export PATH="/usr/local/go/bin:$PATH"
 
 ENV GOPATH /go
 ENV PATH $GOPATH/bin:/usr/local/go/bin:$PATH
@@ -115,7 +115,7 @@ ENV DOCKER_VERSION=18.09.2
 
 RUN curl -fsSLO https://download.docker.com/linux/static/stable/x86_64/docker-${DOCKER_VERSION}.tgz \
   && tar xzvf docker-${DOCKER_VERSION}.tgz --strip 1 \
-                 -C /usr/local/bin docker/docker \
+  -C /usr/local/bin docker/docker \
   && rm docker-${DOCKER_VERSION}.tgz
 
 USER ubuntu