fix: Dockerfile to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-DEBIAN12-CURL-5955014
- https://snyk.io/vuln/SNYK-DEBIAN12-CURL-5955014
- https://snyk.io/vuln/SNYK-DEBIAN12-CURL-5955014
- https://snyk.io/vuln/SNYK-DEBIAN12-GLIBC-5927132
- https://snyk.io/vuln/SNYK-DEBIAN12-OPENSSH-5788319

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.19.11
+FROM golang:1.20.10
 
 # Install pact ruby standalone binaries
 RUN curl -LO https://github.com/pact-foundation/pact-ruby-standalone/releases/download/v2.0.3/pact-2.0.3-linux-x86_64.tar.gz; \