diff --git a/docker-compose.yml b/docker-compose.yml
index b08cfc0f..e35baf09 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,8 +1,13 @@
+x-go-build-args: &go-build-args
+  GOPROXY: "${GOPROXY:-https://goproxy.cn|https://proxy.golang.org|direct}"
+  GOSUMDB: "${GOSUMDB:-sum.golang.org}"
+
 services:
   gateway-service:
     build:
       context: .
       dockerfile: services/gateway-service/Dockerfile
+      args: *go-build-args
     container_name: gateway-service
     environment:
       TZ: UTC
@@ -26,6 +31,7 @@ services:
     build:
       context: .
       dockerfile: services/room-service/Dockerfile
+      args: *go-build-args
     container_name: room-service
     environment:
       TZ: UTC
@@ -49,6 +55,7 @@ services:
     build:
       context: .
       dockerfile: services/wallet-service/Dockerfile
+      args: *go-build-args
     container_name: wallet-service
     environment:
       TZ: UTC
@@ -72,6 +79,7 @@ services:
     build:
       context: .
       dockerfile: services/user-service/Dockerfile
+      args: *go-build-args
     container_name: user-service
     environment:
       TZ: UTC
@@ -91,6 +99,7 @@ services:
     build:
       context: .
       dockerfile: services/activity-service/Dockerfile
+      args: *go-build-args
     container_name: activity-service
     environment:
       TZ: UTC
@@ -112,6 +121,7 @@ services:
     build:
       context: .
       dockerfile: services/cron-service/Dockerfile
+      args: *go-build-args
     container_name: cron-service
     environment:
       TZ: UTC
diff --git a/services/activity-service/Dockerfile b/services/activity-service/Dockerfile
index f35fe34c..c10ab51e 100644
--- a/services/activity-service/Dockerfile
+++ b/services/activity-service/Dockerfile
@@ -2,6 +2,11 @@ FROM golang:1.26.3-alpine AS builder
 
 WORKDIR /src
 
+# Module proxy is a build-time contract so Docker builds can recover from transient proxy EOFs.
+ARG GOPROXY=https://goproxy.cn|https://proxy.golang.org|direct
+ARG GOSUMDB=sum.golang.org
+ENV GOPROXY=${GOPROXY} GOSUMDB=${GOSUMDB}
+
 COPY go.mod go.sum ./
 COPY api/go.mod api/go.sum ./api/
 RUN GOWORK=off go mod download
diff --git a/services/cron-service/Dockerfile b/services/cron-service/Dockerfile
index f3488f50..60cac8e8 100644
--- a/services/cron-service/Dockerfile
+++ b/services/cron-service/Dockerfile
@@ -2,6 +2,11 @@ FROM golang:1.26.3-alpine AS builder
 
 WORKDIR /src
 
+# Module proxy is a build-time contract so Docker builds can recover from transient proxy EOFs.
+ARG GOPROXY=https://goproxy.cn|https://proxy.golang.org|direct
+ARG GOSUMDB=sum.golang.org
+ENV GOPROXY=${GOPROXY} GOSUMDB=${GOSUMDB}
+
 COPY go.mod go.sum ./
 COPY api/go.mod api/go.sum ./api/
 RUN GOWORK=off go mod download
diff --git a/services/gateway-service/Dockerfile b/services/gateway-service/Dockerfile
index 601c8bf3..e27123aa 100644
--- a/services/gateway-service/Dockerfile
+++ b/services/gateway-service/Dockerfile
@@ -2,6 +2,11 @@ FROM golang:1.26.3-alpine AS builder
 
 WORKDIR /src
 
+# Module proxy is a build-time contract so Docker builds can recover from transient proxy EOFs.
+ARG GOPROXY=https://goproxy.cn|https://proxy.golang.org|direct
+ARG GOSUMDB=sum.golang.org
+ENV GOPROXY=${GOPROXY} GOSUMDB=${GOSUMDB}
+
 COPY go.mod go.sum ./
 COPY api/go.mod api/go.sum ./api/
 RUN GOWORK=off go mod download
diff --git a/services/room-service/Dockerfile b/services/room-service/Dockerfile
index 7f848466..036dbbdd 100644
--- a/services/room-service/Dockerfile
+++ b/services/room-service/Dockerfile
@@ -2,6 +2,11 @@ FROM golang:1.26.3-alpine AS builder
 
 WORKDIR /src
 
+# Module proxy is a build-time contract so Docker builds can recover from transient proxy EOFs.
+ARG GOPROXY=https://goproxy.cn|https://proxy.golang.org|direct
+ARG GOSUMDB=sum.golang.org
+ENV GOPROXY=${GOPROXY} GOSUMDB=${GOSUMDB}
+
 COPY go.mod go.sum ./
 COPY api/go.mod api/go.sum ./api/
 RUN GOWORK=off go mod download
diff --git a/services/user-service/Dockerfile b/services/user-service/Dockerfile
index a660eff5..c5f43451 100644
--- a/services/user-service/Dockerfile
+++ b/services/user-service/Dockerfile
@@ -2,6 +2,11 @@ FROM golang:1.26.3-alpine AS builder
 
 WORKDIR /src
 
+# Module proxy is a build-time contract so Docker builds can recover from transient proxy EOFs.
+ARG GOPROXY=https://goproxy.cn|https://proxy.golang.org|direct
+ARG GOSUMDB=sum.golang.org
+ENV GOPROXY=${GOPROXY} GOSUMDB=${GOSUMDB}
+
 COPY go.mod go.sum ./
 COPY api/go.mod api/go.sum ./api/
 RUN GOWORK=off go mod download
diff --git a/services/wallet-service/Dockerfile b/services/wallet-service/Dockerfile
index 4f6fe148..64a8d515 100644
--- a/services/wallet-service/Dockerfile
+++ b/services/wallet-service/Dockerfile
@@ -2,6 +2,11 @@ FROM golang:1.26.3-alpine AS builder
 
 WORKDIR /src
 
+# Module proxy is a build-time contract so Docker builds can recover from transient proxy EOFs.
+ARG GOPROXY=https://goproxy.cn|https://proxy.golang.org|direct
+ARG GOSUMDB=sum.golang.org
+ENV GOPROXY=${GOPROXY} GOSUMDB=${GOSUMDB}
+
 COPY go.mod go.sum ./
 COPY api/go.mod api/go.sum ./api/
 RUN GOWORK=off go mod download