fix: docker/Dockerfile to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-DEBIAN8-PYTHON27-340042
- https://snyk.io/vuln/SNYK-DEBIAN8-PYTHON27-341356
- https://snyk.io/vuln/SNYK-DEBIAN8-SYSTEMD-305088
- https://snyk.io/vuln/SNYK-DEBIAN8-WGET-300469
- https://snyk.io/vuln/SNYK-DEBIAN8-WGET-342200

docker/Dockerfile

@@ -1,5 +1,5 @@
 # Use the base image with Node.js
-FROM node:8.12
+FROM node:8.17
 
 # Copy the current directory into the Docker image
 COPY . /topcoder-x-processor