Upgrade GH Actions versions (#37)

Author: ruzickap

.github/workflows/markdown.yml

@@ -35,7 +35,7 @@ jobs:
       - uses: actions/checkout@v2
 
       - name: Install Node.js 12
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v2
         with:
           node-version: 12.x
 

.github/workflows/shellcheck.yml

@@ -20,4 +20,4 @@ jobs:
       - uses: actions/checkout@v2
 
       - name: Lint check
-        uses: azohra/shell-linter@latest
+        uses: azohra/shell-linter@v0.4.0

.github/workflows/yamllint.yml

@@ -20,4 +20,4 @@ jobs:
       - uses: actions/checkout@v2
 
       - name: yamllint
-        uses: ibiqlik/action-yamllint@v1
+        uses: ibiqlik/action-yamllint@v3

Dockerfile

@@ -21,9 +21,8 @@ SHELL ["/bin/ash", "-eo", "pipefail", "-c"]
 # - https://github.com/docker/docker-ce/blob/v17.09.0-ce/components/engine/hack/make.sh#L149
 # - https://github.com/golang/go/blob/go1.9.1/src/net/conf.go#L194-L275
 # - docker run --rm debian:stretch grep '^hosts:' /etc/nsswitch.conf
-RUN [ ! -e /etc/nsswitch.conf ] && echo 'hosts: files dns' > /etc/nsswitch.conf
-
 RUN set -eux && \
+    [ ! -e /etc/nsswitch.conf ] && echo 'hosts: files dns' > /etc/nsswitch.conf && \
     apk add --no-cache bash ca-certificates wget && \
     if [ "${MUFFET_VERSION}" = "latest" ]; then \
       MUFFET_URL=$(wget -qO- https://api.github.com/repos/raviqqe/muffet/releases/latest | grep "browser_download_url.*muffet_.*_Linux_x86_64.tar.gz" | cut -d \" -f 4) ; \