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--- marc:linux:docker [2022/04/18 10:32] – [Docker Compose:] marcv
+++ marc:linux:docker [2022/04/19 10:03] (current) – [2 phase container building:] marcv
@@ Line 253: / Line 253: @@
         context: .                               # working directory
         dockerfile: ./Dockerfile.dev             # define another file than default (Dockerfile)
                                                  # it can also be a url to a git_directory
 </code>
@@ Line 303: / Line 303: @@
 {{:marc:linux:github_workflow.png?direct&800|}}
+===== 2 phase container building: =====
+By using a multiphase build we can:
+  - Use multiple images
+  - Reduce space by only copying the needed contents to the final container
+{{:marc:linux:multi_phase_build.png?direct&800|}}
+The __Dockerfile__ would look something like this:
+<code>
+FROM node:alpine as builder        # Using "as" we can tag this phase
+WORKDIR '/app'
+COPY package.json .
+RUN npm install
+COPY . .
+RUN npm run build                  # This creates the content we want to serve in the /app/build directory
+FROM nginx                         # Not using another tag; we differentiate the phases using "FROM"
+COPY --from=builder /app/build /usr/share/nginx/html
+</code>
+Notice we did not define the RUN command; this is not needed as this container will start nginx itself.