add readme info (#3)

* add readme info and examples

README.md

@@ -1 +1,48 @@
-Base docker image for gravity-ui projects
+
+# Docker nodejs
+
+Ubuntu based docker image with nginx and nodejs.
+
+## Usage example
+
+See example docker files in [examples folder](./examples).
+
+## Push image to container registry
+
+Images now are saved in [Github container registry](https://github.com/orgs/gravity-ui/packages/container/package/node-nginx).
+
+To push new image to registry you need to do:
+
+0. Install docker
+
+1. Switch on main branch
+
+`git checkout main`
+
+2. Login
+
+- Create [Personal Access Token](https://docs.github.com/en/authentication/keeping-your-account-and-data-secure/creating-a-personal-access-token) with permissions `read:packages` and `write:packages`
+
+- Save token to env variable:
+
+```bash
+export CR_PAT=<TOKEN>
+```
+
+- Login in registry:
+
+```bash
+echo $CR_PAT | docker login ghcr.io -u gravity-ui --password-stdin
+```
+
+3. Build new image
+
+`docker build . --tag gravity-ui/node-nginx:latest`
+
+4. Tag image
+
+`docker image tag gravity-ui/node-nginx ghcr.io/gravity-ui/node-nginx:ubuntu20-nodejs18`
+
+5. Push image
+
+`docker image push ghcr.io/gravity-ui/node-nginx:ubuntu20-nodejs18`

examples/Dockerfile.default

@@ -0,0 +1,23 @@
+#Example for nodejs project with nginx and supervisor 
+FROM ghcr.io/gravity-ui/node-nginx:ubuntu20-nodejs18
+
+RUN mkdir -p /opt/app
+
+WORKDIR /opt/app
+
+COPY package.json package-lock.json /opt/app/
+
+RUN npm i -g npm@latest
+RUN npm ci
+
+COPY . .
+COPY ./deploy/nginx /etc/nginx
+COPY ./deploy/supervisor/ /etc/supervisor/conf.d
+
+RUN npm run build && \
+    rm -rf deploy tests /tmp/* /root/.npm && \
+    chown app /opt/app/dist/run
+
+EXPOSE 80
+
+CMD ["/usr/bin/supervisord"]