ultimate docker solution

core/Dockerfile

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+FROM --platform=$BUILDPLATFORM golang:1.22-alpine AS singbox-builder
+LABEL maintainer="Alireza <alireza7@gmail.com>"
+WORKDIR /app
+ARG TARGETOS TARGETARCH
+ARG SINGBOX_VER=v1.8.10
+ARG SINGBOX_TAGS="with_quic,with_grpc,with_wireguard,with_ech,with_utls,with_reality_server,with_acme,with_v2ray_api,with_clash_api,with_gvisor"
+ARG GOPROXY=""
+ENV GOPROXY ${GOPROXY}
+ENV CGO_ENABLED=0
+ENV GOOS=$TARGETOS
+ENV GOARCH=$TARGETARCH
+RUN apk --no-cache --update add build-base gcc wget unzip git
+RUN set -ex \
+    && git clone --depth 1 --branch $SINGBOX_VER https://github.com/SagerNet/sing-box.git \
+    && cd sing-box \
+    && go build -v -trimpath -tags \
+        $SINGBOX_TAGS \
+        -ldflags "-X \"github.com/sagernet/sing-box/constant.Version=$SINGBOX_VER\" -s -w -buildid=" \
+        ./cmd/sing-box
+
+FROM --platform=$BUILDPLATFORM alpine
+LABEL maintainer="Alireza <alireza7@gmail.com>"
+ENV TZ=Asia/Tehran
+WORKDIR /app
+RUN apk add  --no-cache --update ca-certificates tzdata bash
+COPY --from=singbox-builder /app/sing-box/sing-box .
+COPY runSingbox.sh .
+ENTRYPOINT [ "./runSingbox.sh" ]

core/runSingbox.sh

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+#!/bin/bash
+
+set -e
+
+tokill=$$
+
+runSingbox(){
+  ./sing-box run &
+  tokill=$!
+}
+
+terminateSingbox()
+{
+  if kill -0 $tokill > /dev/null 2>&1; then
+    echo "Terminating singbox PID=$tokill"
+    kill $tokill
+    while kill -0 $tokill > /dev/null 2>&1; do
+      sleep 1
+    done
+  fi
+}
+
+trap terminateSingbox SIGINT SIGTERM SIGKILL
+
+runSingbox
+
+while true
+do
+    sleep 5
+    if [ -f "signal" ]; then
+        signal=`cat signal`
+        echo "Signal received: $signal"
+        # Remove singnal file
+        rm -f signal >> /dev/null 2>&1
+        case ${signal} in 
+            "stop")
+                terminateSingbox
+                ;;
+            "restart")
+                terminateSingbox
+                runSingbox
+                ;;
+        esac
+    fi
+done