Support ARMv7

[innobead]

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[innobead]

https://github.com/innobead/huber/runs/1930794494?check_suite_focus=true

There was a build issue happening in docker buildx and it should be fixed at upstream first.

#9 59.21 cargo fmt
#9 63.71 cargo build --release --workspace --exclude=huber-generator
#9 66.98     Updating crates.io index
#9 67.26 warning: spurious network error (2 tries remaining): could not read directory '/usr/local/cargo/registry/index/github.com-1285ae84e5963aae/.git//refs': Value too large for defined data type; class=Os (2)
#9 67.44 warning: spurious network error (1 tries remaining): could not read directory '/usr/local/cargo/registry/index/github.com-1285ae84e5963aae/.git//refs': Value too large for defined data type; class=Os (2)
#9 67.66 error: failed to get `Inflector` as a dependency of package `huber v0.2.5 (/workspace/src/app)`
#9 67.66 
#9 67.66 Caused by:
#9 67.66   failed to fetch `https://github.com/rust-lang/crates.io-index`
#9 67.66 
#9 67.66 Caused by:
#9 67.66   could not read directory '/usr/local/cargo/registry/index/github.com-1285ae84e5963aae/.git//refs': Value too large for defined data type; class=Os (2)
#9 67.67 make[1]: *** [Makefile:21: build] Error 101
#9 67.67 make[1]: Leaving directory '/workspace'
#9 67.67 make: *** [Makefile:34: release] Error 2
#9 ERROR: executor failed running [/bin/sh -c suffix=$(echo ${TARGETPLATFORM} | sed "s/\//-/g") &&     apt update &&     apt install -y sudo &&     make setup-dev &&     make ${MAKE_TARGET} &&     apt-get clean &&     rustup self uninstall -y &&     cp target/${BUILD_TARGET}/huber target/${BUILD_TARGET}/huber-${suffix}]: exit code: 2
------
 > [build 4/4] RUN suffix=$(echo linux/arm/v7 | sed "s/\//-/g") &&     apt update &&     apt install -y sudo &&     make setup-dev &&     make release &&     apt-get clean &&     rustup self uninstall -y &&     cp target/release/huber target/release/huber-${suffix}:
------
Dockerfile.build:8
--------------------
   7 |     COPY . /workspace
   8 | >>> RUN suffix=$(echo ${TARGETPLATFORM} | sed "s/\//-/g") && \
   9 | >>>     apt update && \
  10 | >>>     apt install -y sudo && \
  11 | >>>     make setup-dev && \
  12 | >>>     make ${MAKE_TARGET} && \
  13 | >>>     apt-get clean && \
  14 | >>>     rustup self uninstall -y && \
  15 | >>>     cp target/${BUILD_TARGET}/huber target/${BUILD_TARGET}/huber-${suffix}
  16 |     
--------------------
error: failed to solve: rpc error: code = Unknown desc = executor failed running [/bin/sh -c suffix=$(echo ${TARGETPLATFORM} | sed "s/\//-/g") &&     apt update &&     apt install -y sudo &&     make setup-dev &&     make ${MAKE_TARGET} &&     apt-get clean &&     rustup self uninstall -y &&     cp target/${BUILD_TARGET}/huber target/${BUILD_TARGET}/huber-${suffix}]: exit code: 2
+ cleanup
+ docker buildx rm builder
make: *** [Makefile:74: release-multiarch] Error 1

[innobead]

Although the automatic build is not ready, the code is ready for ARMv7 supported.