Add nginx-matrix

nginx-matrix/Dockerfile

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+FROM nginx:latest
+EXPOSE 80
+EXPOSE 443
+EXPOSE 8448

nginx-matrix/Dockerfile.arm32v7

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+FROM arm32v7/nginx:latest
+COPY qemu-arm-static /usr/bin
+EXPOSE 80
+EXPOSE 443
+EXPOSE 8448

nginx-matrix/hooks/post_checkout

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+#!/bin/bash
+curl -L https://github.com/balena-io/qemu/releases/download/v3.0.0%2Bresin/qemu-3.0.0+resin-arm.tar.gz | tar zxvf - -C . && mv qemu-3.0.0+resin-arm/qemu-arm-static . && pwd && ls

nginx-matrix/hooks/pre_build

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+#!/bin/bash
+#register qemu-*-static for all supported processors except the 
+# current one, but also remove all registered binfmt_misc before
+docker run --rm --privileged multiarch/qemu-user-static:register --reset