Bump files to use alpine:3.8

Bump Dockerfiles and mentions of alpine 3.7 to be now
3.8

Signed-off-by: Martin Dekov (VMware) <mdekov@vmware.com>

contrib/alertmanager-arm64/v0.15.0/Dockerfile

-FROM alpine:3.7
+FROM alpine:3.8
 WORKDIR /root
 RUN apk add --update libarchive-tools
 ADD https://github.com/prometheus/alertmanager/releases/download/v0.15.0/alertmanager-0.15.0.linux-arm64.tar.gz /root/
@@ -14,4 +14,4 @@ WORKDIR    /alertmanager
 
 ENTRYPOINT [ "/bin/alertmanager" ]
 CMD        [ "--config.file=/etc/alertmanager/alertmanager.yml", \
-             "--storage.path=/alertmanager" ]
+    "--storage.path=/alertmanager" ]

contrib/alertmanager-armhf/0.15.0/Dockerfile

-FROM alpine:3.7
+FROM alpine:3.8
 WORKDIR /root
 RUN apk add --update libarchive-tools
 ADD https://github.com/prometheus/alertmanager/releases/download/v0.15.0/alertmanager-0.15.0.linux-armv7.tar.gz /root/
@@ -14,4 +14,4 @@ WORKDIR    /alertmanager
 
 ENTRYPOINT [ "/bin/alertmanager" ]
 CMD        [ "--config.file=/etc/alertmanager/alertmanager.yml", \
-             "--storage.path=/alertmanager" ]
+    "--storage.path=/alertmanager" ]

contrib/prometheus-arm64/2.3/Dockerfile

-FROM alpine:3.7
+FROM alpine:3.8
 WORKDIR /root/
 
 RUN apk add --update libarchive-tools curl \
@@ -25,7 +25,7 @@ WORKDIR    /prometheus
 
 ENTRYPOINT [ "/bin/prometheus" ]
 CMD        [ "--config.file=/etc/prometheus/prometheus.yml", \
-             "--storage.tsdb.path=/prometheus", \
-             "--web.console.libraries=/usr/share/prometheus/console_libraries", \
-             "--web.console.templates=/usr/share/prometheus/consoles" ]
+    "--storage.tsdb.path=/prometheus", \
+    "--web.console.libraries=/usr/share/prometheus/console_libraries", \
+    "--web.console.templates=/usr/share/prometheus/consoles" ]
 

contrib/prometheus-armhf/2.2/Dockerfile

-FROM alpine:3.7
+FROM alpine:3.8
 WORKDIR /root/
 
 RUN apk add --update libarchive-tools curl \
@@ -24,8 +24,8 @@ VOLUME     [ "/prometheus" ]
 WORKDIR    /prometheus
 ENTRYPOINT [ "/bin/prometheus" ]
 CMD        [ "--config.file=/etc/prometheus/prometheus.yml", \
-             "--storage.tsdb.path=/prometheus", \
-             "--web.console.libraries=/usr/share/prometheus/console_libraries", \
-             "--web.console.templates=/usr/share/prometheus/consoles" ]
+    "--storage.tsdb.path=/prometheus", \
+    "--web.console.libraries=/usr/share/prometheus/console_libraries", \
+    "--web.console.templates=/usr/share/prometheus/consoles" ]
 
 

gateway/Dockerfile

@@ -4,8 +4,8 @@ ARG GIT_COMMIT_MESSAGE
 ARG VERSION='dev'
 
 RUN curl -sSfL https://github.com/alexellis/license-check/releases/download/0.2.2/license-check \
-      > /usr/bin/license-check \
-      && chmod +x /usr/bin/license-check
+    > /usr/bin/license-check \
+    && chmod +x /usr/bin/license-check
 
 WORKDIR /go/src/github.com/openfaas/faas/gateway
 
@@ -28,19 +28,19 @@ RUN license-check -path ./ --verbose=false "Alex Ellis" "OpenFaaS Project" "Open
     && test -z "$(gofmt -l $(find . -type f -name '*.go' -not -path "./vendor/*"))" \
     && go test $(go list ./... | grep -v integration | grep -v /vendor/ | grep -v /template/) -cover \
     && CGO_ENABLED=0 GOOS=linux go build --ldflags "-s -w \
-     -X github.com/openfaas/faas/gateway/version.GitCommitSHA=${GIT_COMMIT_SHA}\
-     -X \"github.com/openfaas/faas/gateway/version.GitCommitMessage=${GIT_COMMIT_MESSAGE}\"\
-     -X github.com/openfaas/faas/gateway/version.Version=${VERSION}" \
+    -X github.com/openfaas/faas/gateway/version.GitCommitSHA=${GIT_COMMIT_SHA}\
+    -X \"github.com/openfaas/faas/gateway/version.GitCommitMessage=${GIT_COMMIT_MESSAGE}\"\
+    -X github.com/openfaas/faas/gateway/version.Version=${VERSION}" \
     -a -installsuffix cgo -o gateway .
 
-FROM alpine:3.7
+FROM alpine:3.8
 
 LABEL org.label-schema.license="MIT" \
-      org.label-schema.vcs-url="https://github.com/openfaas/faas" \
-      org.label-schema.vcs-type="Git" \
-      org.label-schema.name="openfaas/faas" \
-      org.label-schema.vendor="openfaas" \
-      org.label-schema.docker.schema-version="1.0"
+    org.label-schema.vcs-url="https://github.com/openfaas/faas" \
+    org.label-schema.vcs-type="Git" \
+    org.label-schema.name="openfaas/faas" \
+    org.label-schema.vendor="openfaas" \
+    org.label-schema.docker.schema-version="1.0"
 
 RUN addgroup -S app \
     && adduser -S -g app app

gateway/Dockerfile.arm64

@@ -20,7 +20,7 @@ COPY server.go      .
 #RUN license-check -path ./ --verbose=false \
 RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o gateway .
 
-FROM alpine:3.7
+FROM alpine:3.8
 
 RUN addgroup -S app \
     && adduser -S -g app app

gateway/Dockerfile.armhf

@@ -18,7 +18,7 @@ COPY server.go      .
 
 RUN GOARM=7 CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o gateway .
 
-FROM alpine:3.7
+FROM alpine:3.8
 WORKDIR /root/
 
 EXPOSE 8080

guide/deployment_swarm_arm.md

@@ -142,7 +142,7 @@ $ faas-cli build -f callme.yml
  Building: alexellis/callme:armhf with node template. Please wait..
  docker build -t alexellis/callme:armhf .
  Sending build context to Docker daemon  8.704kB
- Step 1/16 : FROM alpine:3.7
+ Step 1/16 : FROM alpine:3.8
   ---> 16566b7ed19e
 ...
 

sample-functions/AlpineFunction/Dockerfile.arm64

-FROM alpine:3.7
+FROM alpine:3.8
 
 RUN apk --no-cache add curl \
     && curl -sL https://github.com/openfaas/faas/releases/download/0.9.6/fwatchdog-arm64 > /usr/bin/fwatchdog \

sample-functions/ApiKeyProtected-Secrets/Dockerfile

@@ -14,7 +14,7 @@ COPY handler.go .
 
 RUN go install
 
-FROM alpine:3.7
+FROM alpine:3.8
 
 # Needed to reach the hub
 RUN apk --no-cache add ca-certificates 

sample-functions/CHelloWorld/src/Dockerfile

-FROM alpine:3.7 as builder
+FROM alpine:3.8 as builder
 RUN apk add --no-cache curl \
     && curl -SL https://github.com/openfaas/faas/releases/download/0.9.6/fwatchdog > /usr/bin/fwatchdog \
     && chmod +x /usr/bin/fwatchdog \
@@ -7,12 +7,12 @@ RUN apk add --no-cache curl \
 WORKDIR /root/
 
 RUN apk add --no-cache gcc \
-                       musl-dev
+    musl-dev
 COPY main.c     .
 
 RUN gcc main.c -static -o /main \
- && chmod +x /main \
- && /main
+    && chmod +x /main \
+    && /main
 
 FROM scratch
 

sample-functions/CaptainsIntent/Dockerfile

-FROM alpine:3.7
+FROM alpine:3.8
 RUN apk --update add nodejs nodejs-npm
 
 RUN apk --no-cache add curl \

sample-functions/ChangeColorIntent/Dockerfile

-FROM alpine:3.7
+FROM alpine:3.8
 RUN apk --update add nodejs nodejs-npm
 
 RUN apk --no-cache add curl \

sample-functions/DockerHubStats/Dockerfile

@@ -13,7 +13,7 @@ COPY . /go/src/github.com/openfaas/faas/sample-functions/DockerHubStats
 
 RUN make install
 
-FROM alpine:3.7
+FROM alpine:3.8
 
 # Needed to reach the hub
 RUN apk --no-cache add ca-certificates 

sample-functions/DockerHubStats/Dockerfile.armhf

@@ -13,7 +13,7 @@ COPY . /go/src/github.com/openfaas/faas/sample-functions/DockerHubStats
 
 RUN make install
 
-FROM alpine:3.7
+FROM alpine:3.8
 
 # Needed to reach the hub
 RUN apk --no-cache add ca-certificates 

sample-functions/HostnameIntent/Dockerfile

-FROM alpine:3.7
+FROM alpine:3.8
 RUN apk --update add nodejs nodejs-npm
 
 RUN apk --no-cache add curl \

sample-functions/MarkdownRender/Dockerfile

@@ -14,7 +14,7 @@ COPY vendor vendor
 
 RUN go install
 
-FROM alpine:3.7
+FROM alpine:3.8
 
 # Needed to reach the hub
 RUN apk --no-cache add ca-certificates 

sample-functions/NodeInfo/Dockerfile

-FROM alpine:3.7
+FROM alpine:3.8
 
 RUN apk --update add nodejs nodejs-npm
 

sample-functions/NodeInfo/Dockerfile.arm64

-FROM alpine:3.7
+FROM alpine:3.8
 
 RUN apk --update add nodejs nodejs-npm
 

sample-functions/NodeInfo/Dockerfile.armhf

-FROM alpine:3.7
+FROM alpine:3.8
 RUN apk --no-cache add nodejs nodejs-npm
 
 RUN apk --no-cache add curl \