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example: fixed dockerfile snippet in readme

This commit is contained in:
Sameer Naik 2017-10-09 09:54:58 +05:30
parent 8543015409
commit 2a11b59edd
1 changed files with 9 additions and 6 deletions
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15
bitnami/node/example/README.md
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@ -25,20 +25,23 @@ $ express --git --css less example/
To build a production Docker image of our application we'll use the `bitnami/node:6-prod` image, which is a production build of the Bitnami Node Image optimized for size.
```dockerfile
FROM bitnami/node:6-prod
FROM bitnami/node:6 as builder
ENV NODE_ENV="production"
COPY . /app
WORKDIR /app
RUN npm install
FROM bitnami/node:6-prod
ENV NODE_ENV="production"
COPY --from=builder /app /app
WORKDIR /app
EXPOSE 3000
CMD ["npm", "start"]
```
We use the above `Dockerfile` to `COPY` the example application at the `/app` path of the container and install the npm module dependencies with the command `npm install`. Finally the Express application is start with `npm start`.
The `Dockerfile` consists of two build stages. The first stage uses the development image, `bitnami/node:6`, to copy the application source and install the required application modules using `npm install`. The `NODE_ENV` environment variable is defined so that `npm install` only installs the application modules that are required in `production` executions.
The second stage uses the production image, `bitnami/node:6-prod`, and copies over the application source and the installed modules from the previous stage. This creates a minimal Docker image that only consists of the application source, node modules and the node runtime.
To build the Docker image, execute the command: