Cross compile for armv7/armv8, raise raspi variant to armv6 (only) (#737)

* Add arm cross compile changes from #602
* Bump pi arm version
* Prevent caching of yarn key
* Add dockerignore for build dockerfile

docker/compiler/Dockerfile

@@ -10,9 +10,12 @@ ENV PACKR2_DOWNLOAD_URL=https://github.com/gobuffalo/packr/releases/download/v${
 # Install tools
 RUN apt-get update && apt-get install -y apt-transport-https
 RUN curl -sL https://deb.nodesource.com/setup_10.x | bash -
-RUN curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - && \
-    echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list
 
+# prevent caching of the key
+ADD https://dl.yarnpkg.com/debian/pubkey.gpg yarn.gpg
+RUN cat yarn.gpg | apt-key add - && \
+    echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list && \
+    rm yarn.gpg
 
 RUN apt-get update && \
     apt-get install -y automake autogen \
@@ -20,6 +23,8 @@ RUN apt-get update && \
     patch make tar xz-utils bzip2 gzip sed cpio \
 	gcc-6-multilib g++-6-multilib gcc-mingw-w64 g++-mingw-w64 clang llvm-dev \
 	gcc-arm-linux-gnueabi libc-dev-armel-cross linux-libc-dev-armel-cross \
+    gcc-arm-linux-gnueabihf libc-dev-armhf-cross \
+    gcc-aarch64-linux-gnu libc-dev-arm64-cross \
 	nodejs yarn --no-install-recommends || exit 1; \
 	rm -rf /var/lib/apt/lists/*;
 

docker/compiler/Makefile

@@ -1,6 +1,6 @@
-user=stashappdev
+user=stashapp
 repo=compiler
-version=2
+version=3
 
 latest:
 	docker build -t ${user}/${repo}:latest .