🐛 Fix sqlite DATABASE_DIR path; 📝 rewrite README 🐛

DATABASE_DIR fix (08-gitea.sh):
DATABASE_SERVICE_TYPE="sqlite" triggers a generic block that appends
/$SERVER_NAME to /data/db/sqlite. Before the SERVER_NAME fix that was
empty giving /data/db/sqlite//gitea.db; even after it would be
/data/db/sqlite/<hostname> not under DATA_DIR. Re-pin DATABASE_DIR to
$DATA_DIR/db/sqlite after the generic block.
README rewrite:
- Full env var reference table (GITEA_SERVER, GITEA_PROTO, GITEA_NAME,
GITEA_ADMIN, GITEA_EMAIL_*, GITEA_SQL_*, ACT_RUNNER_FALLBACK_VERSION,
RUNNERS_START, DOMAIN, DEBUGGER)
- Volume and port tables
- Production notes: --privileged required, GITEA_SERVER must be set,
mailer disabled by default, DNS override explained
- Canonical section order: Docker → Development → License
- README.md: full rewrite with env vars, volumes, ports, and production notes
- rootfs/usr/local/etc/docker/init.d/08-gitea.sh: fix DATABASE_DIR to always use $DATA_DIR/db/sqlite

README.md
rootfs/usr/local/etc/docker/init.d/08-gitea.sh

rootfs/usr/local/etc/docker/init.d/08-gitea.sh

@@ -832,6 +832,9 @@ elif [ "$SERVICE_NAME" = "sqlite" ] || [ "$DATABASE_SERVICE_TYPE" = "sqlite" ];
 	[ -d "$DATABASE_DIR" ] || mkdir -p "$DATABASE_DIR"
 	chmod 777 "$DATABASE_DIR"
 fi
+# Override: gitea always uses a fixed sqlite path under DATA_DIR, not the generic /data/db/sqlite/$SERVER_NAME
+DATABASE_DIR="$DATA_DIR/db/sqlite"
+[ -d "$DATABASE_DIR" ] || mkdir -p "$DATABASE_DIR"
 [ -n "$DATABASE_ADMIN_WWW_ROOT" ] && { [ ! -d "$DATABASE_ADMIN_WWW_ROOT" ] || mkdir -p "${DATABASE_ADMIN_WWW_ROOT}"; }
 # - - - - - - - - - - - - - - - - - - - - - - - - -
 # Allow variables via imports - Overwrite existing