Fix architecture on ARM images

Dockerfile.arm32v6

@@ -12,8 +12,10 @@ COPY . .
 RUN make build
 RUN touch /config.yaml
 
-FROM gcr.io/distroless/static
+FROM arm32v6/alpine
 WORKDIR /pomerium
+COPY --from=multiarch/qemu-user-static /usr/bin/qemu-arm-static /usr/bin/
+RUN apk --no-cache add ca-certificates
 COPY --from=build /go/src/github.com/pomerium/pomerium/bin/* /bin/
 COPY --from=build /config.yaml /pomerium/config.yaml
 ENTRYPOINT [ "/bin/pomerium" ]

Dockerfile.arm32v7

@@ -12,8 +12,10 @@ COPY . .
 RUN make build
 RUN touch /config.yaml
 
-FROM gcr.io/distroless/static
+FROM arm32v7/alpine
 WORKDIR /pomerium
+COPY --from=multiarch/qemu-user-static /usr/bin/qemu-arm-static /usr/bin/
+RUN apk --no-cache add ca-certificates
 COPY --from=build /go/src/github.com/pomerium/pomerium/bin/* /bin/
 COPY --from=build /config.yaml /pomerium/config.yaml
 ENTRYPOINT [ "/bin/pomerium" ]

Dockerfile.arm64v8

@@ -11,8 +11,10 @@ COPY . .
 RUN make build
 RUN touch /config.yaml
 
-FROM gcr.io/distroless/static
+FROM arm64v8/alpine
 WORKDIR /pomerium
+COPY --from=multiarch/qemu-user-static /usr/bin/qemu-aarch64-static /usr/bin/
+RUN apk --no-cache add ca-certificates
 COPY --from=build /go/src/github.com/pomerium/pomerium/bin/* /bin/
 COPY --from=build /config.yaml /pomerium/config.yaml
 ENTRYPOINT [ "/bin/pomerium" ]

hooks/post_checkout

@@ -0,0 +1,4 @@
+#!/bin/bash
+
+apt-get update
+apt-get install -y curl binfmt-support

hooks/pre_build

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+docker run --rm --privileged multiarch/qemu-user-static --reset