[JENKINS-55547] Switch to Centos as base image

Main goal is to have an easier path for future JDK upgrades, which is
very risky for Alpine.

distribution/Dockerfile

@@ -1,4 +1,4 @@
-FROM node:10-alpine
+FROM centos:7.6.1810
 
 ARG user=jenkins
 ARG group=jenkins
@@ -50,18 +50,33 @@ EXPOSE ${agent_port}
 # The only dependencies for Jenkins Evergreen are:
 #   * supervisor
 #   * nodejs
-RUN apk add --no-cache git \
+RUN yum update -y
+RUN yum install -y --setopt=skip_missing_names_on_install=False \
+        epel-release
+RUN yum install -y --setopt=skip_missing_names_on_install=False \
+                        git \
                         ca-certificates \
-                        openssh-client \
+                        openssh-clients \
                         unzip \
                         bash \
-                        openjdk8 \
+                        java-1.8.0-openjdk \
                         supervisor \
-                        ttf-dejavu \
+                        dejavu-sans-mono-fonts \
                         curl \
                         socat \
                         nginx
 
+# Use the auto-install script, but prevent any unnoticed change
+# https://linuxize.com/post/how-to-install-node-js-on-centos-7/
+RUN curl -sL https://rpm.nodesource.com/setup_10.x > /tmp/install-node && \
+    echo "2050d9584f54fd1da7dfc54f52eac24d  /tmp/install-node" | md5sum --check && \
+    cat /tmp/install-node| bash - && \
+    rm /tmp/install-node
+RUN yum install -y --setopt=skip_missing_names_on_install=False \
+    nodejs
+RUN node --version | grep '^v10.' > /dev/null && \
+    npm --version | grep '^6.' > /dev/null
+
 # Ensure the latest npm is available
 RUN npm install npm@latest -g
 
@@ -79,10 +94,8 @@ RUN cd /tmp && \
 # Jenkins is run with user `jenkins`, uid = 1000
 # If you bind mount a volume from the host or a data container,
 # ensure you use the same uid
-RUN deluser node && \
-    addgroup -g ${gid} ${group} && \
-    adduser -h "$JENKINS_HOME" -u ${uid} -G ${group} -s /bin/bash -D ${user}
-
+RUN groupadd -g ${gid} ${group}
+RUN adduser --home-dir "$JENKINS_HOME" --uid ${uid} --gid ${group} --shell /bin/bash ${user}
 
 COPY commit.txt /
 

distribution/scripts/start-client.sh

@@ -24,4 +24,5 @@ else
   echo "Client is starting up"
 fi
 
-exec /usr/local/bin/npm run start
+export PATH=/usr/bin:/usr/local/bin:$PATH
+exec npm run start

distribution/tests/offline-tests.sh

@@ -14,7 +14,7 @@ oneTimeSetUp() {
 
 # JENKINS-49864
 test_docker_CLI_available() {
-  docker exec "$container_under_test" which docker > /dev/null
+  docker exec "$container_under_test" docker --version > /dev/null
   assertEquals "docker found in the PATH" 0 $?
 
   # Check that not only something called docker can be found on the PATH