Answer
It maps host port 8080 to container port 80, allowing external traffic from the host to reach the container.
Quick Answer
-p 8080:80 maps port 80 inside the container to port 8080 on your host machine. Traffic hitting localhost:8080 on your machine is forwarded to port 80 in the container. Format is always host:container. Without -p, the container's port is unreachable from outside.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ