Remove frontend npm tuning and keep standard install path

.env.example

@@ -44,14 +44,6 @@ VITE_API_BASE=
 # Development-only Vite host allowlist override.
 VITE_ALLOWED_HOSTS=
 
-# Optional frontend build network and npm fetch tuning:
-DOCKER_BUILD_NETWORK=default
-NPM_REGISTRY=https://registry.npmjs.org/
-NPM_FETCH_RETRIES=5
-NPM_FETCH_RETRY_MINTIMEOUT=20000
-NPM_FETCH_RETRY_MAXTIMEOUT=120000
-NPM_FETCH_TIMEOUT=300000
-
 # Production baseline overrides (set explicitly for live deployments):
 # APP_ENV=production
 # HOST_BIND_IP=127.0.0.1

doc/operations-and-configuration.md

@@ -42,24 +42,9 @@ Tail logs:
 docker compose logs -f
 ```
 
-## Frontend Build Network Resilience
+## Frontend Build Baseline
 
-The frontend Dockerfile uses `node:22-slim` by default for improved npm network compatibility on IPv4-only Linux hosts.
+The frontend Dockerfile uses `node:22-slim` with a standard `npm ci --no-audit` install step and no npm-specific build tuning flags.
-
-The frontend image build supports npm fetch tuning through environment-driven compose build args:
-
-- `NPM_REGISTRY` (default `https://registry.npmjs.org/`)
-- `NPM_FETCH_RETRIES` (default `5`)
-- `NPM_FETCH_RETRY_MINTIMEOUT` (default `20000`)
-- `NPM_FETCH_RETRY_MAXTIMEOUT` (default `120000`)
-- `NPM_FETCH_TIMEOUT` (default `300000`)
-- `DOCKER_BUILD_NETWORK` (default `default`; set to `host` on Linux hosts when bridge-network npm fetches time out)
-
-If frontend dependency downloads fail with npm `ETIMEDOUT` during `docker compose build`, keep defaults first, then try:
-
-```bash
-DOCKER_BUILD_NETWORK=host docker compose build --no-cache frontend
-```
 
 ## Authentication Model
 

docker-compose.yml

@@ -144,14 +144,8 @@ services:
     build:
       context: ./frontend
       target: ${APP_ENV:-development}
-      network: ${DOCKER_BUILD_NETWORK:-default}
       args:
         VITE_API_BASE: ${VITE_API_BASE:-}
-        NPM_REGISTRY: ${NPM_REGISTRY:-https://registry.npmjs.org/}
-        NPM_FETCH_RETRIES: ${NPM_FETCH_RETRIES:-5}
-        NPM_FETCH_RETRY_MINTIMEOUT: ${NPM_FETCH_RETRY_MINTIMEOUT:-20000}
-        NPM_FETCH_RETRY_MAXTIMEOUT: ${NPM_FETCH_RETRY_MAXTIMEOUT:-120000}
-        NPM_FETCH_TIMEOUT: ${NPM_FETCH_TIMEOUT:-300000}
     environment:
       VITE_API_BASE: ${VITE_API_BASE:-}
       CORS_ORIGINS: '${CORS_ORIGINS:-["http://localhost:5173","http://localhost:3000"]}'

frontend/Dockerfile

@@ -1,21 +1,10 @@
 FROM node:22-slim AS base
 
-ARG NPM_REGISTRY=https://registry.npmjs.org/
-ARG NPM_FETCH_RETRIES=5
-ARG NPM_FETCH_RETRY_MINTIMEOUT=20000
-ARG NPM_FETCH_RETRY_MAXTIMEOUT=120000
-ARG NPM_FETCH_TIMEOUT=300000
-
 WORKDIR /app
 
 COPY package.json /app/package.json
 COPY package-lock.json /app/package-lock.json
-RUN npm config set registry "${NPM_REGISTRY}" \
+RUN npm ci --no-audit \
-    && npm config set fetch-retries "${NPM_FETCH_RETRIES}" \
-    && npm config set fetch-retry-mintimeout "${NPM_FETCH_RETRY_MINTIMEOUT}" \
-    && npm config set fetch-retry-maxtimeout "${NPM_FETCH_RETRY_MAXTIMEOUT}" \
-    && npm config set fetch-timeout "${NPM_FETCH_TIMEOUT}" \
-    && NODE_OPTIONS=--dns-result-order=ipv4first npm ci --no-audit \
     && chown -R node:node /app
 
 COPY --chown=node:node tsconfig.json /app/tsconfig.json