Update angular repo-container

repository-containers/github.com/angular/angular/.devcontainer/Dockerfile

@@ -3,14 +3,17 @@
 # Licensed under the MIT License. See LICENSE in the project root for license information.
 #-----------------------------------------------------------------------------------------
 
-FROM openjdk:7
+FROM openjdk:8
 
 # Install git
 RUN apt-get update && apt-get -y install git
 
 # https support
 RUN apt-get install apt-transport-https
 
+# get gcc
+RUN apt-get update &&apt-get install build-essential -y
+
 # Install Node.js v10-stable
 RUN curl -sL https://deb.nodesource.com/setup_10.x | bash - \
     && apt-get install -y nodejs
@@ -23,4 +26,4 @@ RUN curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - \
 # Clean up
 RUN apt-get autoremove -y \
     && apt-get clean -y \
-    && rm -rf /var/lib/apt/lists/*
+    && rm -rf /var/lib/apt/lists/*