이미지와 컨테이너의 차이점

Docker 파일 빌드 컨텍스트

WORKDIR /src
COPY . .

- docker-concepts-you-should-know
  - src
    - WebApi
      - WebApi.csproj
      - Program.cs
      - Dockerfile
       

- src
  - src
    - WebApi
      - WebApi.csproj
      - Program.cs
      - Dockerfile
       

빌드 시간 및 런타임

You are able to run apps while docker build building image with RUN statement. And you can run your apps in running container with ENTRYPOINT or with docker exec. Normally you might need to run your development tools build time, but your service or utils (like database migration) in runtime.
Build time executions are focused on image content, for example you might want to build binaries from source code. Build time you don't have your private network and volumes, so you can't have access to database.

레이아웃 캐싱

Each statement in docker file produces image cache layer on docker host machine.
Cache layers could help application build time, for example
dotnet restore result will be cached if files copied to the docker image are the same. That is why default Dockerfile generated by visual studio copies csproj files first, and other files only after dotnet restore.

WORKDIR /src
COPY ["src/webapi/webapi.csproj", "src/webapi/"]
RUN dotnet restore "src/webapi/webapi.csproj"
COPY . .

*.sh text eol=lf

git update-index --chmod=+x foo.sh