feat(spa): opt-in 'https' nx serve config for dev-server TLS (#263)

## Summary

Add an opt-in `https` configuration to the SPA dev-servers so the ADR-0030 dockerised dev mode can be reached over a hostname registered in Entra. Entra refuses `http:` redirect URIs for anything other than `localhost`, which made the hostname-based access pattern (`apf-portal.dev-jg.local`, `apf-portal.dev.local`, …) — the only stable way to share a VM-based dev stack with another developer — impossible to wire to OIDC. This PR closes that gap without touching the WSL-native + localhost flow.

## What lands

| File | Change |
| --- | --- |
| `apps/portal-shell/project.json`, `apps/portal-admin/project.json` | New `https` Nx serve configuration: inherits the `development` build, sets `ssl: true` + `sslKey: .secrets/dev-tls.key` + `sslCert: .secrets/dev-tls.pem`. `defaultConfiguration` stays `development`; the `https` config is purely opt-in. |
| `infra/local/dev.compose.yml` | The `portal-shell` and `portal-admin` commands now end with `--configuration=${NX_SERVE_CONFIGURATION:-development}`. Compose interpolates the value at YAML parse time from `infra/local/.env`. Default is `development` (no SSL), so behaviour is unchanged for anyone who doesn't opt in. |
| `infra/local/.env.example` | New commented-out `NX_SERVE_CONFIGURATION=https` block with the rationale + pointer to the mkcert setup. |
| `apps/portal-bff/.env.example` | Comment block above the `ENTRA_*_REDIRECT_URI` defaults shows the HTTPS hostname-based override pattern (the four URIs that go with the `apps` profile when accessing via a hostname) and reminds that each override must be registered Entra-side. |
| `infra/README.md` | New "HTTPS dev-server setup — remote-browser access via a hostname" subsection: mkcert install / `mkcert -install`, cert generation, `.secrets/dev-tls.{key,pem}` convention, Entra registration reminder, `NX_SERVE_CONFIGURATION=https` opt-in. Notes that WSL-native is unaffected and that the cert path stays the same when the corp CA eventually replaces mkcert. |

## Design notes

- **Convention `.secrets/dev-tls.{key,pem}` at repo root.** Matches the existing `apps/portal-bff/.secrets/jwks.pem` pattern (gitignored via `*.pem` + `*.key`). Workspace-relative path means project.json can hardcode it and each dev drops their per-host cert there.
- **Hardcoded path, per-dev cert content.** Each developer generates a cert for **their own** hostname; the cert sits at the same fixed path on every machine. Nothing dev-specific in `project.json`.
- **`https` is opt-in, not default.** Native `nx serve` keeps booting on HTTP (`localhost:4200`) without SSL key files, exactly as before. Compose default is also `development` — only setting `NX_SERVE_CONFIGURATION=https` in `infra/local/.env` switches it on, gated by the dev having actually run the mkcert step.
- **BFF stays plain HTTP.** Only the SPA dev-server terminates TLS — the proxy then hits `http://portal-bff:3000` on the internal Compose network. Entra still gets HTTPS at the browser-facing origin, which is what its policy enforces.

## What this PR deliberately does NOT do

- It does **not** force-enable HTTPS. Devs who don't care about hostname access continue working as before.
- It does **not** touch the BFF code, the Entra config helpers, or the auth flow itself. The whole change is config (project.json + compose + env-examples) + docs.
- It does **not** ship the shared VM cert story. That needs a corp-CA-signed cert (or a shared mkcert CA distributed across workstations); flagged in the README section as a follow-up.

## Test plan

- [x] Both `project.json` files parse as JSON; `nx show project` exposes the new `https` configuration with the expected SSL options.
- [x] `docker compose -f dev.compose.yml --profile apps config` validates with `NX_SERVE_CONFIGURATION=https` (resolves to `--configuration=https`) and without it (resolves to `--configuration=development`).
- [ ] **On vm-jg**: `mkcert -install` on the workstation, `mkcert` against `apf-portal.dev-jg.local`, copy `.secrets/dev-tls.{key,pem}` to the VM, set `NX_SERVE_CONFIGURATION=https` in `infra/local/.env`, register the four `https://apf-portal.dev-jg.local:*` URIs in Entra, restart `dev.sh up apps`, then open `https://apf-portal.dev-jg.local:4200/` from the workstation → SPA loads, no cert warning, sign-in completes and returns to the SPA via the OIDC callback.
- [ ] Native WSL flow unchanged: `nx serve portal-shell` still boots on `http://localhost:4200/`, OIDC against the existing `http://localhost:3000/...` Entra URIs still works.

## Related

- [ADR-0030](docs/decisions/0030-dockerised-dev-mode.md) — the dockerised dev mode this completes for the hostname-access case.
- [ADR-0018](docs/decisions/0018-environment-configuration-strategy.md) — per-environment SPA config strategy; `https` is a new Nx serve _configuration_, not a new `environment.ts` sibling, so 0018's build-time replacement story is unchanged.
- [ADR-0009](docs/decisions/0009-auth-flow-oidc-pkce-msal-node.md) — OIDC flow; no behaviour change, only the redirect-URI strings.

---------

Co-authored-by: Julien Gautier <julien.gautier@apf.asso.fr>
Reviewed-on: #263

apps/portal-admin/project.json

@@ -93,6 +93,12 @@
         },
         "development": {
           "buildTarget": "portal-admin:build:development"
+        },
+        "https": {
+          "buildTarget": "portal-admin:build:development",
+          "ssl": true,
+          "sslKey": ".secrets/dev-tls.key",
+          "sslCert": ".secrets/dev-tls.pem"
         }
       },
       "defaultConfiguration": "development"

apps/portal-bff/.env.example

@@ -60,6 +60,25 @@ ENTRA_CLIENT_SECRET=replace_with_real_value
 # User portal — `/api/auth/callback` is the OIDC return URL; the
 # post-logout URL is where Entra sends the browser after RP-initiated
 # logout (typically the SPA landing page).
+#
+# The default values below match WSL-native dev (browser on the same
+# host as the BFF, accessing http://localhost:4200/). For the
+# ADR-0030 dockerised dev mode accessed via a hostname (e.g.
+# https://apf-portal.dev-jg.local:4200/), override these to point at
+# the SPA dev-server origin instead — `/api/auth/callback` is then
+# proxied to the BFF (see apps/portal-shell/proxy.conf.js):
+#
+#   ENTRA_REDIRECT_URI=https://apf-portal.dev-jg.local:4200/api/auth/callback
+#   ENTRA_POST_LOGOUT_REDIRECT_URI=https://apf-portal.dev-jg.local:4200/
+#   ENTRA_ADMIN_REDIRECT_URI=https://apf-portal.dev-jg.local:4300/api/admin/auth/callback
+#   ENTRA_ADMIN_POST_LOGOUT_REDIRECT_URI=https://apf-portal.dev-jg.local:4300/
+#
+# The `https:` scheme is mandatory for non-`localhost` hosts — Entra
+# rejects `http:` for anything else. See the "HTTPS dev-server setup"
+# section of infra/README.md for the dev-server TLS / mkcert setup.
+# Each override URI must also be registered in the Entra app
+# registration's Redirect URIs list (the BFF sends *one* of them per
+# auth request; Entra validates it is allowed).
 ENTRA_REDIRECT_URI=http://localhost:3000/api/auth/callback
 ENTRA_POST_LOGOUT_REDIRECT_URI=http://localhost:4200/
 # Admin portal — distinct callback per ADR-0020 §"Sessions — distinct

apps/portal-shell/project.json

@@ -92,6 +92,12 @@
         },
         "development": {
           "buildTarget": "portal-shell:build:development"
+        },
+        "https": {
+          "buildTarget": "portal-shell:build:development",
+          "ssl": true,
+          "sslKey": ".secrets/dev-tls.key",
+          "sslCert": ".secrets/dev-tls.pem"
         }
       },
       "defaultConfiguration": "development"

infra/README.md

@@ -226,6 +226,50 @@ How it works (see [ADR-0030](../docs/decisions/0030-dockerised-dev-mode.md)):
 
 The three dev modes (native `nx serve`, devcontainer, this `apps` profile) and when to use each are summarised in [docs/setup/01-dev-debian-vm-setup.md](../docs/setup/01-dev-debian-vm-setup.md).
 
+### HTTPS dev-server setup — remote-browser access via a hostname
+
+By default the dev-servers serve plain HTTP — fine when the browser is on the same host as the BFF (`http://localhost:4200/`), which is also the only HTTP origin Entra accepts as a redirect URI. The moment you access the SPA over a **hostname** (e.g. `apf-portal.dev.local`, useful when the browser sits on a workstation and the stack runs on a shared / per-dev VM), Entra refuses the `http:` redirect URI and the dev-servers must terminate TLS.
+
+The setup is one-time per dev:
+
+1. **Install [mkcert](https://github.com/FiloSottile/mkcert)** on your workstation (the machine where the browser runs) and bootstrap its local CA:
+
+   ```bash
+   # Debian / WSL Ubuntu:
+   sudo apt install -y libnss3-tools
+   # macOS:
+   #   brew install mkcert nss
+   # Windows (PowerShell, choco):
+   #   choco install mkcert
+   mkcert -install
+   ```
+
+2. **Generate the cert** for the hostname you registered in your `/etc/hosts` and in Entra. From the repo root on your workstation:
+
+   ```bash
+   mkdir -p .secrets
+   mkcert -key-file .secrets/dev-tls.key -cert-file .secrets/dev-tls.pem \
+          apf-portal.dev-jg.local      # ← replace with YOUR hostname
+   ```
+
+   `.secrets/` is git-ignored; the bind-mount in the `apps` profile (the repo at `/workspace`) makes the files visible inside the containers at the path the `https` configuration expects.
+
+3. **Update `apps/portal-bff/.env`** so the BFF tells Entra the matching HTTPS URIs — see the redirect-URI block in [`apps/portal-bff/.env.example`](../apps/portal-bff/.env.example) for the override pattern. The same URIs must be registered in your Entra app registration's "Redirect URIs" list (the BFF only sends one of them per auth request; Entra validates it is on the list).
+
+4. **Enable the `https` Nx serve configuration** for the compose dev-servers by adding to `infra/local/.env`:
+
+   ```env
+   NX_SERVE_CONFIGURATION=https
+   ```
+
+   The compose command resolves `--configuration=${NX_SERVE_CONFIGURATION:-development}` at parse time, so the SPAs pick up the `https` config defined in `apps/portal-shell/project.json` and `apps/portal-admin/project.json`. The BFF stays HTTP behind the proxy — only the public origin is HTTPS.
+
+5. `./infra/local/dev.sh up apps` → browser opens `https://apf-portal.dev-jg.local:4200/`. No cert warning (mkcert's CA is trusted by the workstation after step 1).
+
+Native `nx serve` (WSL / localhost) is **unaffected** — it keeps using the `development` configuration by default, no SSL required, and the `localhost` URIs registered in Entra still work.
+
+When real DNS + corp-CA-signed certs arrive, the hostname can be reused as-is (Entra registrations are literal strings — they don't care who signs the cert). Drop the cert files back into `.secrets/` and remove the mkcert step.
+
 ### Service endpoints (defaults)
 
 | Service                      | Host port | Purpose                                                                                                                                                                                                                         |

infra/local/.env.example

@@ -35,3 +35,20 @@ OTEL_HTTP_PORT=4318
 PGWEB_PORT=8081
 JAEGER_UI_PORT=16686
 SERVE_STATIC_PORT=4200
+
+# ---------------------------------------------------------------- Apps (`--profile apps`)
+# Nx serve configuration for the SPA dev-servers. Two values matter:
+#   - `development` (default) — plain HTTP. Use with `localhost`
+#                               browser access; Entra accepts
+#                               `http://localhost:*` redirect URIs.
+#   - `https`                 — TLS-terminating dev-server using the
+#                               cert at `.secrets/dev-tls.{key,pem}`.
+#                               Required when accessing the SPA via a
+#                               hostname (e.g. `apf-portal.dev.local`)
+#                               since Entra rejects `http:` for any
+#                               non-`localhost` redirect URI. See the
+#                               "HTTPS dev-server setup" section of
+#                               infra/README.md for the mkcert
+#                               procedure and how to wire the
+#                               matching `ENTRA_REDIRECT_URI` value.
+# NX_SERVE_CONFIGURATION=https

infra/local/dev.compose.yml

@@ -266,7 +266,27 @@ services:
       # /api proxy at the BFF container by name (Compose DNS). Native
       # `nx serve` leaves BFF_TARGET unset and falls back to localhost.
       BFF_TARGET: http://portal-bff:3000
-    command: ['pnpm', 'exec', 'nx', 'serve', 'portal-shell', '--host', '0.0.0.0', '--port', '4200']
+    # `--configuration=${NX_SERVE_CONFIGURATION:-development}` is
+    # interpolated by Compose at YAML parse time from
+    # `infra/local/.env`. Set `NX_SERVE_CONFIGURATION=https` there to
+    # serve over TLS — required when accessing via a hostname (Entra
+    # rejects `http:` for non-`localhost` redirect URIs). See the
+    # `https` configuration in apps/portal-shell/project.json + the
+    # "HTTPS dev-server setup" section in infra/README.md for the
+    # mkcert procedure.
+    command:
+      [
+        'pnpm',
+        'exec',
+        'nx',
+        'serve',
+        'portal-shell',
+        '--host',
+        '0.0.0.0',
+        '--port',
+        '4200',
+        '--configuration=${NX_SERVE_CONFIGURATION:-development}',
+      ]
     ports:
       - '${SHELL_PORT:-4200}:4200'
     depends_on:
@@ -279,7 +299,20 @@ services:
     environment:
       # See portal-shell — same proxy target for the admin SPA.
       BFF_TARGET: http://portal-bff:3000
-    command: ['pnpm', 'exec', 'nx', 'serve', 'portal-admin', '--host', '0.0.0.0', '--port', '4300']
+    # See portal-shell for the NX_SERVE_CONFIGURATION rationale.
+    command:
+      [
+        'pnpm',
+        'exec',
+        'nx',
+        'serve',
+        'portal-admin',
+        '--host',
+        '0.0.0.0',
+        '--port',
+        '4300',
+        '--configuration=${NX_SERVE_CONFIGURATION:-development}',
+      ]
     ports:
       - '${ADMIN_PORT:-4300}:4300'
     depends_on: