Add build-scripts with docker

build/Dockerfile

@@ -0,0 +1,13 @@
+# ---- Build ----
+FROM golang:1.19-alpine AS build
+WORKDIR /build
+# Copy sources
+ADD . .
+# Get dependencies
+RUN go get ./cmd/app
+# Compile
+RUN CGO_ENABLED=0 go build -a -o app ./cmd/app
+
+# ---- Output ----
+FROM scratch AS export-stage
+COPY --from=build /build/app .

build/build-multiarch.sh

@@ -0,0 +1,9 @@
+PLATFORM="linux/amd64,linux/arm64/v8,linux/arm/v7"
+EXTRA_ARGS="$@"
+
+docker buildx build \
+    --platform $PLATFORM \
+    -f $(dirname $0)/Dockerfile \
+    --output out \
+    $EXTRA_ARGS \
+    .

build/build-ownarch.sh

@@ -0,0 +1,7 @@
+EXTRA_ARGS="$@"
+
+docker build \
+    -f $(dirname $0)/Dockerfile \
+    --output out \
+    $EXTRA_ARGS \
+    .