fix: add --platform=linux/amd64 to Dockerfiles for cross-platform build

Dockerfile.ops

@@ -1,5 +1,5 @@
 # syntax=docker/dockerfile:1.7
-FROM node:22-alpine AS build
+FROM --platform=linux/amd64 node:22-alpine AS build
 WORKDIR /workspace
 
 COPY package.json ./package.json
@@ -19,7 +19,7 @@ RUN cd ops-platform && \
     VITE_API_BASE_URL=${OPS_API_BASE_URL} \
     yarn build
 
-FROM nginx:1.27-alpine
+FROM --platform=linux/amd64 nginx:1.27-alpine
 
 COPY nginx/ops.conf /etc/nginx/conf.d/default.conf
 COPY --from=build /workspace/ops-platform/dist /usr/share/nginx/html

Dockerfile.tenant

@@ -1,5 +1,5 @@
 # syntax=docker/dockerfile:1.7
-FROM node:22-alpine AS build
+FROM --platform=linux/amd64 node:22-alpine AS build
 WORKDIR /workspace
 
 COPY package.json ./package.json
@@ -22,7 +22,7 @@ RUN cd tenant-platform && \
 
 RUN cd docs-site && yarn build
 
-FROM nginx:1.27-alpine
+FROM --platform=linux/amd64 nginx:1.27-alpine
 
 COPY nginx/tenant.conf /etc/nginx/conf.d/default.conf
 COPY --from=build /workspace/tenant-platform/dist /usr/share/nginx/html/tenant