A perimeter defense using laser turrets. Tileable on Nilaus's city block from his Welcome to Factorio series and blueprints.
Nilaus is keeping his blueprints on his confluence website: https://nilaus.atlassian.net/wiki/spaces/PM/pages/894369794/Factorio+S27+-+Welcome+to+Factorio
Corner, Edge, and Point variants to cover all your angles.
The wall is placed just outside big bitter range. 7-wide, 3 deep dragons teeth all the way around.
Expansion variants are for bot build-out and have the minimum walling.