fix: make all Docker builds and Makefiles arch-aware

- nomad-nodepool-apm/Dockerfile: use TARGETARCH instead of hardcoded amd64
- api/docker-bake.hcl: parameterize platforms via BUILD_PLATFORM variable
- clickhouse, dashboard-api, docker-reverse-proxy Makefiles: add standard
  BUILD_ARCH/BUILD_PLATFORM definitions, use $(BUILD_PLATFORM) consistently

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: 2 people

packages/api/docker-bake.hcl

@@ -10,14 +10,18 @@ variable "EXPECTED_MIGRATION_TIMESTAMP" {
   default = ""
 }
 
+variable "BUILD_PLATFORM" {
+  default = "linux/amd64"
+}
+
 group "default" {
   targets = ["api", "db-migrator"]
 }
 
 target "api" {
   context    = "."
   dockerfile = "api/Dockerfile"
-  platforms  = ["linux/amd64"]
+  platforms  = [BUILD_PLATFORM]
   tags       = ["${REGISTRY_PREFIX}/api"]
   args = {
     COMMIT_SHA                   = COMMIT_SHA
@@ -28,6 +32,6 @@ target "api" {
 target "db-migrator" {
   context    = "."
   dockerfile = "db/Dockerfile"
-  platforms  = ["linux/amd64"]
+  platforms  = [BUILD_PLATFORM]
   tags       = ["${REGISTRY_PREFIX}/db-migrator"]
 }

packages/clickhouse/Makefile

@@ -2,6 +2,9 @@ ENV := $(shell cat ../../.last_used_env || echo "not-set")
 -include ../../.env.${ENV}
 PREFIX := $(strip $(subst ",,$(PREFIX)))
 
+BUILD_ARCH ?= $(shell go env GOARCH)
+BUILD_PLATFORM ?= linux/$(BUILD_ARCH)
+
 CLICKHOUSE_HOST ?= clickhouse
 
 ifeq ($(PROVIDER),aws)
@@ -33,7 +36,7 @@ migrate-local:
 
 .PHONY: build
 build:
-	@docker build --platform linux/$(or $(BUILD_ARCH),$(shell go env GOARCH)) --tag "$(CLICKHOUSE_MIGRATOR_IMAGE)" .
+	@docker build --platform $(BUILD_PLATFORM) --tag "$(CLICKHOUSE_MIGRATOR_IMAGE)" .
 
 .PHONY: build-and-upload
 build-and-upload:build

packages/dashboard-api/Makefile

@@ -2,6 +2,9 @@ ENV := $(shell cat ../../.last_used_env || echo "not-set")
 -include ../../.env.${ENV}
 PREFIX := $(strip $(subst ",,$(PREFIX)))
 
+BUILD_ARCH ?= $(shell go env GOARCH)
+BUILD_PLATFORM ?= linux/$(BUILD_ARCH)
+
 expectedMigration := $(shell ./../../scripts/get-latest-migration.sh)
 
 ifeq ($(PROVIDER),aws)
@@ -28,7 +31,7 @@ build:
 build-and-upload:
 		$(eval COMMIT_SHA := $(shell git rev-parse --short HEAD))
 		$(eval EXPECTED_MIGRATION_TIMESTAMP := $(expectedMigration))
-		@ docker build --platform linux/$(or $(BUILD_ARCH),$(shell go env GOARCH)) --tag $(IMAGE_REGISTRY) --push --build-arg COMMIT_SHA="$(COMMIT_SHA)" --build-arg EXPECTED_MIGRATION_TIMESTAMP="$(EXPECTED_MIGRATION_TIMESTAMP)"  -f ./Dockerfile ..
+		@ docker build --platform $(BUILD_PLATFORM) --tag $(IMAGE_REGISTRY) --push --build-arg COMMIT_SHA="$(COMMIT_SHA)" --build-arg EXPECTED_MIGRATION_TIMESTAMP="$(EXPECTED_MIGRATION_TIMESTAMP)"  -f ./Dockerfile ..
 
 .PHONY: run
 run:

packages/docker-reverse-proxy/Makefile

@@ -2,6 +2,9 @@ ENV := $(shell cat ../../.last_used_env || echo "not-set")
 -include ../../.env.${ENV}
 PREFIX := $(strip $(subst ",,$(PREFIX)))
 
+BUILD_ARCH ?= $(shell go env GOARCH)
+BUILD_PLATFORM ?= linux/$(BUILD_ARCH)
+
 ifeq ($(PROVIDER),aws)
 	IMAGE_REGISTRY := $(AWS_ACCOUNT_ID).dkr.ecr.$(AWS_REGION).amazonaws.com/$(PREFIX)core/docker-reverse-proxy
 else
@@ -21,7 +24,7 @@ build-debug:
 .PHONY: build-and-upload
 build-and-upload:
 	$(eval COMMIT_SHA := $(shell git rev-parse --short HEAD))
-	@docker buildx build --platform linux/$(or $(BUILD_ARCH),$(shell go env GOARCH)) --tag $(IMAGE_REGISTRY) --push --build-arg COMMIT_SHA="$(COMMIT_SHA)" -f ./Dockerfile ..
+	@docker buildx build --platform $(BUILD_PLATFORM) --tag $(IMAGE_REGISTRY) --push --build-arg COMMIT_SHA="$(COMMIT_SHA)" -f ./Dockerfile ..
 
 .PHONY: test
 test:

packages/nomad-nodepool-apm/Dockerfile

@@ -13,7 +13,8 @@ RUN go mod download
 COPY . .
 
 # Build the plugin
-RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o /nomad-nodepool-apm .
+ARG TARGETARCH
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=${TARGETARCH} go build -o /nomad-nodepool-apm .
 
 # Final stage - minimal image just to copy the binary from
 FROM scratch