README and default limits (bluesky-social#332)

* README: update default blob size limit

* ensure rate-limit and invite required flag are default true

Author: bnewbold

README.md

@@ -337,7 +337,7 @@ sudo pdsadmin update
 | `PDS_PLC_ROTATION_KEY_K256_PRIVATE_KEY_HEX` | None                               |
 | `PDS_DATA_DIRECTORY`                        | `/pds`                             |
 | `PDS_BLOBSTORE_DISK_LOCATION`               | `/pds/blocks`                      |
-| `PDS_BLOB_UPLOAD_LIMIT`                     | `5242880` (5MB)                    |
+| `PDS_BLOB_UPLOAD_LIMIT`                     | `104857600` (100MB)                |
 | `PDS_DID_PLC_URL`                           | `https://plc.directory`            |
 | `PDS_BSKY_APP_VIEW_URL`                     | `https://api.bsky.app`             |
 | `PDS_BSKY_APP_VIEW_DID`                     | `did:web:api.bsky.app`             |
@@ -351,6 +351,7 @@ sudo pdsadmin update
 | `PDS_PRIVACY_POLICY_URL`                    | None                               |
 | `PDS_TERMS_OF_SERVICE_URL`                  | None                               |
 | `PDS_RATE_LIMITS_ENABLED`                   | `true`                             |
+| `PDS_INVITE_REQUIRED`                       | `true`                             |
 
 ### Migrating your PDS
 

sample.env

@@ -12,5 +12,7 @@ PDS_REPORT_SERVICE_URL=https://mod.bsky.app
 PDS_REPORT_SERVICE_DID=did:plc:ar7c4by46qjdydhdevvrndac
 PDS_CRAWLERS=https://bsky.network
 LOG_ENABLED=true
+PDS_RATE_LIMITS_ENABLED=true
+PDS_INVITE_REQUIRED=true
 PDS_EMAIL_SMTP_URL=
 PDS_EMAIL_FROM_ADDRESS=