Answer
Build tools increase size and attack surface; multi-stage builds remove them.
Quick Answer
Build tools (compilers, make, npm in node_modules) are needed to build the app but not to run it. Including them bloats the image (hundreds of MBs) and adds unnecessary attack surface. Multi-stage builds solve this cleanly: build in a heavy stage, copy only the compiled artifact into a minimal final stage.
S
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