ok

Dockerfile

@@ -6,12 +6,21 @@
 # variable injected by the deployment platform / start.sh (single source of
 # truth = the main application's environment / .env). The Go module requires
 # Go 1.25.
+#
+# IMPORTANT: the build image MUST be glibc-based (bookworm), NOT Alpine. The
+# CGO build links against glibc; a binary built on Alpine (musl) cannot be
+# executed by the Debian runtime image ("cannot execute: required file not
+# found").
 # ---------------------------------------------------------------------------
-FROM golang:1.25.0-alpine AS whatsapp-build
+FROM golang:1.25.0-bookworm AS whatsapp-build
 
-RUN echo "https://dl-4.alpinelinux.org/alpine/v3.22/main" > /etc/apk/repositories \
-    && echo "https://dl-4.alpinelinux.org/alpine/v3.22/community" >> /etc/apk/repositories \
-    && apk update && apk add --no-cache git build-base libjpeg-turbo-dev libwebp-dev
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    build-essential \
+    git \
+    libjpeg62-turbo-dev \
+    libwebp-dev \
+    pkg-config \
+    && rm -rf /var/lib/apt/lists/*
 
 WORKDIR /build
 

start.sh

@@ -112,7 +112,7 @@ if [ -z "$WHATSAPP_SERVICE_ENABLED" ]; then
 fi
 
 export WHATSAPP_SERVICE_ENABLED
-export WHATSAPP_SERVICE_URL="${WHATSAPP_SERVICE_URL:-http://127.0.0.1:${WHATSAPP_SERVICE_PORT}}"
+export WHATSAPP_SERVICE_URL="${WHATSAPP_SERVICE_URL:-http://localhost:${WHATSAPP_SERVICE_PORT}}"
 # Single source of truth: operator sets one of WHATSAPP_SERVICE_GLOBAL_API_KEY /
 # GLOBAL_API_KEY; both the gateway (FastAPI) and the Go service receive it.
 export WHATSAPP_SERVICE_GLOBAL_API_KEY="${WHATSAPP_SERVICE_GLOBAL_API_KEY:-${GLOBAL_API_KEY:-}}"
@@ -162,7 +162,7 @@ if [ "$WHATSAPP_SERVICE_ENABLED" = "true" ]; then
         log "WhatsApp service process group PID: $WHATSAPP_PID"
 
         # Wait for readiness (best effort — non-fatal, gateway degrades gracefully)
-        WHATSAPP_HEALTH_URL="http://127.0.0.1:${WHATSAPP_SERVICE_PORT}/server/ok"
+        WHATSAPP_HEALTH_URL="http://localhost:${WHATSAPP_SERVICE_PORT}/server/ok"
         WHATSAPP_READY=0
         for _ in $(seq 1 30); do
             if curl -fsS -o /dev/null "$WHATSAPP_HEALTH_URL" 2>/dev/null; then