docs: document the environment adapter in the non-container guide (E00-S04-T04)

docs/development/non-container.md

@@ -15,9 +15,9 @@ The workspace is a pnpm monorepo with three package groups:
 
 | Group | Path | Purpose |
 | --- | --- | --- |
-| `apps/` | `apps/server` (`@personal-blog/server`) | Public server application. Serves the application health endpoint (E00-S02-T03) gated on the startup migration run (E00-S03-T06), fails fast at startup with a field-specific error when a required setting is missing (E00-S04-T02), and redacts secret values from all log output (E00-S04-T03); the Fastify 5 application shell lands in a later story. |
+| `apps/` | `apps/server` (`@personal-blog/server`) | Public server application. Serves the application health endpoint (E00-S02-T03) gated on the startup migration run (E00-S03-T06), fails fast at startup with a field-specific error when a required setting is missing (E00-S04-T02), redacts secret values from all log output (E00-S04-T03), and reads all of its settings through the config package's environment adapter — no `process.env` reads in the server (E00-S04-T04); the Fastify 5 application shell lands in a later story. |
 | `packages/` | `packages/core` (`@personal-blog/core`) | Application core (site identity, content primitives). Bootstrap placeholder. |
-| `packages/` | `packages/config` (`@personal-blog/config`) | Configuration service. Owns the TypeBox/Ajv configuration schema for the validated config fields (E00-S04-T01), the field-specific startup error for a missing required setting (E00-S04-T02) and the secret redaction layer (E00-S04-T03); the environment adapter (E00-S04-T04) and the `.env.example` template (E00-S04-T05) land in later tasks. |
+| `packages/` | `packages/config` (`@personal-blog/config`) | Configuration service. Owns the TypeBox/Ajv configuration schema for the validated config fields (E00-S04-T01), the field-specific startup error for a missing required setting (E00-S04-T02), the secret redaction layer (E00-S04-T03) and the environment adapter — the workspace's single owner of `process.env` reads, mapping `HOST`/`PORT`/`DATABASE_URL`/`EPPP_SESSION_SECRET` onto the validated config (E00-S04-T04); the `.env.example` template (E00-S04-T05) lands in a later task. |
 | `packages/` | `packages/database-postgres` (`@personal-blog/database-postgres`) | PostgreSQL database adapter package. Single owner of the `pg`/Kysely driver imports (E00-S03-T02); the migration ledger (`schema_migrations`, E00-S03-T03), the migration advisory lock (E00-S03-T04) and the migration runner with its failure diagnostic (E00-S03-T05) are implemented here. The server depends on this package to run the startup migrations behind its readiness gate (E00-S03-T06). |
 | `extensions/` | `extensions/example` (`@personal-blog/example-extension`) | Example extension exercising the `extensions/` group. Bootstrap placeholder. |
 
@@ -119,6 +119,13 @@ compiled application entrypoint. Three things to know:
    "sessionSecret":"[REDACTED]"}`, and every log line passes through the
    redacting logger — the admin-session secret and the password embedded in a
    `DATABASE_URL` connection string never appear in the log output.
+5. Since [E00-S04-T04], **all settings flow through the config package's
+   environment adapter** (`loadConfigFromEnv` in `@personal-blog/config` —
+   the workspace's single owner of `process.env` reads): `HOST`, `PORT`,
+   `DATABASE_URL` and `EPPP_SESSION_SECRET` are mapped onto the validated
+   config shape (defaults: `host` `0.0.0.0`, `port` 3000, no `databaseUrl`)
+   and validated at startup — no module outside the config package reads
+   `process.env` directly.
 
 To run the compiled output of any other workspace package directly: