diff --git a/docs/dev_environment.md b/docs/dev_environment.md
--- a/docs/dev_environment.md
+++ b/docs/dev_environment.md
@@ -498,7 +498,7 @@
 {
   "baseDomain": "http://localhost",
   "basePath": "/comm/",
-  "baseRoutePath": "/comm/",
+  "baseRoutePath": "/",
   "https": false
 }
 ```
diff --git a/server/src/database/migrations.js b/server/src/database/migrations.js
--- a/server/src/database/migrations.js
+++ b/server/src/database/migrations.js
@@ -30,6 +30,22 @@
   await writeFile.close();
 }
 
+async function fixBaseRoutePathForLocalhost(filePath: string): Promise<void> {
+  const readFile = await fs.promises.open(filePath, 'r');
+  const contents = await readFile.readFile('utf8');
+  let json = JSON.parse(contents);
+  await readFile.close();
+  if (json.baseDomain !== 'http://localhost') {
+    return;
+  }
+  const baseRoutePath = '/';
+  json = { ...json, baseRoutePath };
+  console.warn(`updating ${filePath} to ${JSON.stringify(json)}`);
+  const writeFile = await fs.promises.open(filePath, 'w');
+  await writeFile.writeFile(JSON.stringify(json, null, '  '), 'utf8');
+  await writeFile.close();
+}
+
 const migrations: $ReadOnlyMap<number, () => Promise<void>> = new Map([
   [
     0,
@@ -46,6 +62,13 @@
       } catch {}
     },
   ],
+  [
+    2,
+    async () => {
+      await fixBaseRoutePathForLocalhost('facts/commapp_url.json');
+      await fixBaseRoutePathForLocalhost('facts/squadcal_url.json');
+    },
+  ],
 ]);
 
 async function migrate(): Promise<boolean> {