Fix dashboard build to accomodate upstream changes

Commit 51bb0bb13f in upstream causes builds to fail on any webpack
error. To work around a typescript issue, commit 2181ed1340 adds
'index.d.ts' to the dashboard base directory. Since this is not included
in the packaged maven artifact, this commit adds the same file to the
rh-che dashboard directory and updates the build to copy it along with
the rest of the sources.

Should be undone when typescript is updated >3.5

Signed-off-by: Angel Misevski <amisevsk@redhat.com>

assembly/fabric8-ide-dashboard-war/Dockerfile

@@ -12,7 +12,7 @@
 # Build step: $ docker build -t eclipse-che-dashboard .
 # It builds an archive file that can be used by doing later
 #  $ docker run --rm eclipse-che-dashboard | tar -C target/ -zxf -
-FROM node:8.15.1
+FROM node:8.16.0
 
 ARG SOURCES_DIR
 

assembly/fabric8-ide-dashboard-war/index.d.ts

@@ -0,0 +1,8 @@
+// remove this declaration after upgrading typescript version > 3.5
+import * as _angular from 'angular';
+import * as _jsyaml from 'js-yaml';
+
+declare global {
+  const angular: typeof _angular;
+  const jsyaml: typeof _jsyaml;
+}

assembly/fabric8-ide-dashboard-war/pom.xml

@@ -87,6 +87,7 @@
                                 <copy overwrite="true" todir="${basedir}/target/sources/" verbose="true">
                                     <fileset dir="${basedir}">
                                         <include name="src/**" />
+                                        <include name="index.d.ts" />
                                     </fileset>
                                 </copy>
                             </target>