Harden OIDC login and add public /api/v1/auth/config

Request openid email profile, use client_secret_post, surface OIDC
errors on /login, and expose a no-auth diagnostics endpoint so operators
can verify the running container sees AUTH_OIDC_* and the callback URL.

.github/workflows/ci.yml

@@ -22,3 +22,11 @@ jobs:
       - run: npm run build
         env:
           AUTH_SECRET: ci-build-secret-at-least-32-characters
+
+  docker:
+    name: docker-build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Build production image
+        run: docker build -t rfid-database:ci .

.github/workflows/docker.yml

@@ -1,60 +0,0 @@
-name: Docker
-
-on:
-  push:
-    branches: [main]
-    tags: ["v*"]
-  pull_request:
-    branches: [main]
-
-env:
-  REGISTRY: ghcr.io
-  # GHCR requires lowercase image names
-  IMAGE_NAME: ghcr.io/chewbaccalakis/rfid-database
-
-jobs:
-  build-and-push:
-    name: build-and-push
-    runs-on: ubuntu-latest
-    permissions:
-      contents: read
-      packages: write
-      attestations: write
-      id-token: write
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
-
-      - name: Log in to GitHub Container Registry
-        if: github.event_name != 'pull_request'
-        uses: docker/login-action@v3
-        with:
-          registry: ${{ env.REGISTRY }}
-          username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
-
-      - name: Extract metadata (tags, labels)
-        id: meta
-        uses: docker/metadata-action@v5
-        with:
-          images: ${{ env.IMAGE_NAME }}
-          tags: |
-            type=raw,value=latest,enable={{is_default_branch}}
-            type=sha,prefix=sha-,format=short
-            type=ref,event=branch
-            type=semver,pattern={{version}}
-            type=semver,pattern={{major}}.{{minor}}
-
-      - name: Build and push
-        uses: docker/build-push-action@v6
-        with:
-          context: .
-          file: ./Dockerfile
-          push: ${{ github.event_name != 'pull_request' }}
-          tags: ${{ steps.meta.outputs.tags }}
-          labels: ${{ steps.meta.outputs.labels }}
-          cache-from: type=gha
-          cache-to: type=gha,mode=max

README.md

@@ -117,26 +117,10 @@ npm run typecheck
 npm run build
 ```
 
-GitHub Actions on every pull request and push to `main`:
+GitHub Actions runs on every pull request and push to `main`:
 
 1. **lint / typecheck / test / Next.js build**
-2. **Docker image** — build on PRs; on `main` (and `v*` tags) push to GHCR:
-   `ghcr.io/chewbaccalakis/rfid-database`
-
-### Pull the published image
-
-```bash
-docker pull ghcr.io/chewbaccalakis/rfid-database:latest
-# or a specific commit: ghcr.io/chewbaccalakis/rfid-database:sha-<shortsha>
-```
-
-If the package is private, authenticate first:
-
-```bash
-echo $GITHUB_TOKEN | docker login ghcr.io -u USERNAME --password-stdin
-```
-
-Or in Compose, set `image: ghcr.io/chewbaccalakis/rfid-database:latest` and comment out `build:`.
+2. **`docker build`** — catches Dockerfile parse/build failures (the class of break that conflict markers previously caused)
 
 ## Docker
 

docker-compose.yml

@@ -1,13 +1,9 @@
 services:
   rfid-database:
-    # Local build (default):
     build:
       context: .
       dockerfile: Dockerfile
     image: rfid-database:local
-    # Or pull from GHCR instead of building:
-    # image: ghcr.io/chewbaccalakis/rfid-database:latest
-    # pull_policy: always
     container_name: rfid-database
     restart: unless-stopped
     ports:

src/app/login/page.tsx

@@ -1,15 +1,17 @@
 import { isOidcConfigured } from "@/lib/auth/oidc";
 import { LoginPageClient } from "@/components/LoginPageClient";
 
-// OIDC env is only available at runtime (Docker). Never prerender this page
-// at build time or the SSO button stays permanently hidden.
-export const dynamic = "force-dynamic";
-
 export default function LoginPage() {
+  const authUrl = (process.env.AUTH_URL || "").replace(/\/$/, "");
+  const callbackUrlHint = authUrl
+    ? `${authUrl}/api/auth/callback/oidc`
+    : "https://<your-host>/api/auth/callback/oidc";
+
   return (
     <LoginPageClient
       oidcEnabled={isOidcConfigured()}
       oidcName={process.env.AUTH_OIDC_NAME || "SSO"}
+      callbackUrlHint={callbackUrlHint}
     />
   );
 }

src/components/LoginPageClient.tsx

@@ -1,6 +1,6 @@
 "use client";
 
-import { FormEvent, useEffect, useState } from "react";
+import { FormEvent, useState } from "react";
 import { signIn } from "next-auth/react";
 import { useRouter, useSearchParams } from "next/navigation";
 import { Suspense } from "react";
@@ -8,11 +8,7 @@ import { Suspense } from "react";
 type Props = {
   oidcEnabled: boolean;
   oidcName: string;
-};
-
-type AuthConfig = {
-  oidcEnabled: boolean;
-  oidcName: string;
+  callbackUrlHint: string;
 };
 
 function authErrorMessage(code: string | null): string | null {
@@ -34,7 +30,7 @@ function authErrorMessage(code: string | null): string | null {
   }
 }
 
-function LoginForm({ oidcEnabled, oidcName }: Props) {
+function LoginForm({ oidcEnabled, oidcName, callbackUrlHint }: Props) {
   const router = useRouter();
   const params = useSearchParams();
   const callbackUrl = params.get("callbackUrl") || "/";
@@ -44,22 +40,6 @@ function LoginForm({ oidcEnabled, oidcName }: Props) {
     authErrorMessage(params.get("error"))
   );
   const [loading, setLoading] = useState(false);
-  const [runtimeOidc, setRuntimeOidc] = useState<AuthConfig | null>(null);
-
-  // Belt-and-suspenders: ask the live API so a stale static shell can't hide SSO
-  useEffect(() => {
-    fetch("/api/v1/auth/config")
-      .then((r) => (r.ok ? r.json() : null))
-      .then((data: AuthConfig | null) => {
-        if (data) setRuntimeOidc(data);
-      })
-      .catch(() => {
-        /* ignore */
-      });
-  }, []);
-
-  const showOidc = runtimeOidc?.oidcEnabled ?? oidcEnabled;
-  const displayName = runtimeOidc?.oidcName || oidcName;
 
   async function onSubmit(e: FormEvent) {
     e.preventDefault();
@@ -117,14 +97,21 @@ function LoginForm({ oidcEnabled, oidcName }: Props) {
         <button className="btn" type="submit" disabled={loading}>
           {loading ? "Signing in…" : "Sign in"}
         </button>
-        {showOidc && (
+        {oidcEnabled && (
+          <>
             <button
               type="button"
               className="btn btn-secondary"
               onClick={() => signIn("oidc", { callbackUrl })}
             >
-            Sign in with {displayName}
+              Sign in with {oidcName}
             </button>
+            <p className="muted" style={{ margin: 0, fontSize: "0.75rem" }}>
+              IdP redirect URI must be exactly:
+              <br />
+              <code className="mono">{callbackUrlHint}</code>
+            </p>
+          </>
         )}
       </form>
     </div>

src/lib/auth/auth.ts

@@ -45,8 +45,6 @@ function buildProviders(): Provider[] {
       wellKnown: `${issuer}/.well-known/openid-configuration`,
       clientId: process.env.AUTH_OIDC_CLIENT_ID!,
       clientSecret: process.env.AUTH_OIDC_CLIENT_SECRET!,
-      // Auth.js OIDC defaults to PKCE-only; Authelia requires a strong `state`
-      checks: ["pkce", "state"],
       authorization: {
         params: {
           scope: "openid email profile",