Example Counter

# This is a template for a Dockerfile used to run acts in Actor system.
# The base image name below is set during the act build, based on user settings.
# IMPORTANT: The base image must set a correct working directory, such as /usr/src/app or /home/user
FROM apify/actor-node-basic:v0.21.10

# Second, copy just package.json and package-lock.json since it should be
# the only file that affects "npm install" in the next step, to speed up the build
COPY package*.json ./

# Install NPM packages, skip optional and development dependencies to
# keep the image small. Avoid logging too much and print the dependency
# tree for debugging
RUN npm --quiet set progress=false \
 && npm install --only=prod --no-optional \
 && echo "Installed NPM packages:" \
 && (npm list --all || true) \
 && echo "Node.js version:" \
 && node --version \
 && echo "NPM version:" \
 && npm --version

# Copy source code to container
# Do this in the last step, to have fast build if only the source code changed
COPY  . ./

# NOTE: The CMD is already defined by the base image.
# Uncomment this for local node inspector debugging:
# CMD [ "node", "--inspect=0.0.0.0:9229", "main.js" ]

{
    "name": "apify-project",
    "version": "0.0.1",
    "description": "",
    "author": "It's not you it's me",
    "license": "ISC",
    "dependencies": {
        "apify": "0.21.10"
    },
    "scripts": {
        "start": "node main.js"
    }
}

1const Apify = require('apify');
2
3Apify.main(async () => {
4    // Get store with name 'example-counter'.
5    const store = await Apify.openKeyValueStore('example-counter');
6
7    // Get counter value from store
8    const record = await store.getValue('counter');
9    
10    // If there is no such record then start from zero.
11    let counter = record || 0;
12
13    // Increase counter, print and set as output.
14    counter ++;
15    console.log(`Counter: ${counter}`);
16    Apify.setValue('OUTPUT', counter);
17    
18    // Update the value in store
19    await store.setValue('counter', counter);
20});