add docker remote execution configs for amd64 and arm64

Author: SuburbanDad

.bazelrc

@@ -31,19 +31,23 @@ test --define kafka_enabled=false
 run --define kafka_enabled=false
 
 
-# debug
+# toolchain build debug config
 build:debug --sandbox_debug
 build:debug --toolchain_resolution_debug
 build:debug --verbose_failures
 
-# linux_amd64, not strictly necessary since host/exec env is amd64
+# linux_amd64 conifg for cross compiler toolchain, not strictly necessary since host/exec env is amd64
 build:linux_amd64 --platforms=@io_bazel_rules_go//go/toolchain:linux_amd64_cgo
 
 # linux_amd64_debug
 build:linux_amd64_debug --config=linux_amd64
 build:linux_amd64_debug --config=debug
 
-# linux_arm64
+# linux_amd64 docker sandbox build config
+build:linux_amd64_docker --config=linux_amd64_debug
+build:linux_amd64_docker --config=docker-sandbox
+
+# linux_arm64 conifg for cross compiler toolchain
 build:linux_arm64 --crosstool_top=//tools/cross-toolchain:multiarch_toolchain
 build:linux_arm64 --platforms=@io_bazel_rules_go//go/toolchain:linux_arm64_cgo
 build:linux_arm64 --copt=-funsafe-math-optimizations
@@ -57,3 +61,13 @@ build:linux_arm64 --copt=-march=armv8-a
 build:linux_arm64_debug --config=linux_arm64
 build:linux_arm64_debug --config=debug
 
+# linux_arm64 docker sandbox build config
+build:linux_arm64_docker --config=linux_arm64_debug
+build:linux_arm64_docker --config=docker-sandbox
+
+# Docker Sandbox Mode - Note all docker sandbox configs must run from a linux x86_64 host
+build:docker-sandbox --experimental_docker_image=suburbandad/cross-clang-10:latest
+build:docker-sandbox --spawn_strategy=docker --strategy=Javac=docker --genrule_strategy=docker
+build:docker-sandbox --define=EXECUTOR=remote
+build:docker-sandbox --experimental_docker_verbose
+build:docker-sandbox --experimental_enable_docker_sandbox