build:

• https://docs.docker.com/compose/compose-file/compose-file-v3/#build

Official example:

version: "3.8"
services:
  webapp:
    build: ./dir

dockerfile:
args:

Related

• docker-compose build
• Dockerfile

See also

• Dockerfile: FROM, RUN, CMD, ENTRYPOINT, WORKDIR, COPY, ADD, USER, ENV, ARG, HEALTHCHECK, hadolint, LABEL, EXPOSE
• docker-compose, docker-compose.yml: [services | volumes | networks | up | down | restart | logs | create | changelog | version | secrets | config | -v | -h | exec], docker-compose pull, Environment:, Docker-compose.yml examples, .env, release notes, expose:, docker-compose --env-file, services.deploy.resources
• Build, build automation, make, cmake, docker build, conan build, gradle build, kaniko, AWS CodeBuild, Bazel, Google Cloud Build, meson, Pants, Scons, Buck2, earthly