# Shared nginx server config for all Angular SPA containers.
#
# Five per-app copies of this file exist (b2g/, gMarket/, b2g_website/,
# b2g_filems_fe/ and nibe_datamanager/nibedatamanager_fe/ under docker/) because each SPA
# Dockerfile COPYs it from its own build context. Keep them identical to this one - the root
# copy is what Docker Compose bind-mounts locally, the per-app copies ship in the images.
server {
    listen 80;
    server_name _;
    root /usr/share/nginx/html;
    index index.html;

    # Liveness/readiness probe for ALB target groups and ECS container health checks.
    # Exact-match location, so it outranks the prefix and regex blocks below and never
    # touches the filesystem.
    location = /healthz { access_log off; return 200 "ok
"; }

    # SPA fallback — deep links resolve to index.html
    location / {
        try_files $uri $uri/ /index.html;
    }

    # assets/env.js is REGENERATED AT CONTAINER START by docker/spa-entrypoint.sh and
    # holds the per-environment config (MICROFE_HOST). Unlike every other .js here it has
    # a stable, unhashed filename, so the 7d rule below would pin one environment's config
    # in the browser for a week - which is exactly what happened: browsers kept replaying a
    # stale microfeHost and loaded the menu micro-frontend from the old demo host long after
    # the value had been corrected server-side.
    #
    # Exact-match location, so it outranks the regex block below (nginx tries "=" first).
    # "expires off" stops nginx emitting its own Expires/Cache-Control, so this block
    # sends exactly one Cache-Control header rather than two competing ones.
    location = /assets/env.js {
        add_header Cache-Control "no-store, no-cache, must-revalidate" always;
        expires off;
        try_files $uri =404;
    }

    # Cache immutable build artifacts. Safe because Angular content-hashes these
    # filenames (main-FOXAUEPV.js) - a new build produces a new name.
    location ~* \.(js|css|woff2?|ttf|svg|png|jpg|jpeg|gif|ico)$ {
        expires 7d;
        add_header Cache-Control "public";
        try_files $uri =404;
    }
}