Add initial Docker setup and configuration for self-hosted LiveSync with CouchDB

docker/config/livesync.ini

@@ -0,0 +1,30 @@
+; CouchDB local configuration for Self-hosted LiveSync
+; This file is volume-mounted into /opt/couchdb/etc/local.d/livesync.ini
+;
+; IMPORTANT: Do NOT set require_valid_user here.
+; CouchDB needs to start without auth to complete its first-run cluster setup
+; (_users, _replicator databases must be created first).
+; The couchdb-init service applies auth lockdown via REST API after first-run.
+
+[couchdb]
+; Max size per document (50MB). Large enough for binary attachments.
+max_document_size = 50000000
+
+[chttpd]
+; Bind on all interfaces.
+bind_address = 0.0.0.0
+port = 5984
+; 4 GB max request (handles very large vaults)
+max_http_request_size = 4294967296
+
+[httpd]
+WWW-Authenticate = Basic realm="couchdb"
+
+[cors]
+; These are the exact app origins Obsidian uses on desktop + mobile
+credentials = true
+origins = app://obsidian.md,capacitor://localhost,http://localhost
+
+[log]
+; Reduce noise in Docker logs — set to "debug" if troubleshooting
+level = warning