diff --git a/frontend/Dockerfile b/frontend/Dockerfile
index f9fd026..77df8b2 100644
--- a/frontend/Dockerfile
+++ b/frontend/Dockerfile
@@ -12,11 +12,13 @@ WORKDIR /app
 COPY --from=deps /app/node_modules ./node_modules
 COPY . ./
 
-# Allows configuring the API URL at build time.
+# Allows configuring the API URL and auth at build time.
 ARG NEXT_PUBLIC_API_URL=auto
 ENV NEXT_PUBLIC_API_URL=${NEXT_PUBLIC_API_URL}
 ARG NEXT_PUBLIC_AUTH_MODE
 ENV NEXT_PUBLIC_AUTH_MODE=${NEXT_PUBLIC_AUTH_MODE}
+ARG NEXT_PUBLIC_LOCAL_AUTH_TOKEN
+ENV NEXT_PUBLIC_LOCAL_AUTH_TOKEN=${NEXT_PUBLIC_LOCAL_AUTH_TOKEN}
 
 RUN npm run build
 
@@ -25,11 +27,13 @@ WORKDIR /app
 
 ENV NODE_ENV=production
 ARG NEXT_PUBLIC_AUTH_MODE
+ARG NEXT_PUBLIC_LOCAL_AUTH_TOKEN
 
 # If provided at runtime, Next will expose NEXT_PUBLIC_* to the browser as well
 # (but note some values may be baked at build time).
 ENV NEXT_PUBLIC_API_URL=auto
 ENV NEXT_PUBLIC_AUTH_MODE=${NEXT_PUBLIC_AUTH_MODE}
+ENV NEXT_PUBLIC_LOCAL_AUTH_TOKEN=${NEXT_PUBLIC_LOCAL_AUTH_TOKEN}
 
 # Create non-root user before COPY so --chown can reference it.
 RUN addgroup -S appgroup && adduser -S -G appgroup appuser