Support _FILE env vars

Closes https://github.com/fosrl/docs-v2/issues/141

server/db/sqlite/driver.ts

@@ -6,6 +6,7 @@ import fs from "fs";
 import { APP_PATH } from "@server/lib/consts";
 import { existsSync, mkdirSync } from "fs";
 import logger from "@server/logger";
+import { readEnvOrFile } from "@server/lib/getEnvOrYaml";
 
 export const location = path.join(APP_PATH, "db", "db.sqlite");
 export const exists = checkFileExists(location);
@@ -19,7 +20,7 @@ function createDb() {
             : undefined;
     const sqlite = new Database(location, { verbose });
 
-    if (process.env.ENABLE_SQLITE_WAL_MODE == "true") {
+    if (readEnvOrFile("ENABLE_SQLITE_WAL_MODE") == "true") {
         // Enable WAL mode — allows concurrent readers + single writer, preventing
         // contention across subsystems (verifySession, Traefik, audit, ping).
         // NOTE: journal_mode persists in the DB file once set; unsetting this