fix: Dockerfile to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-ALPINE319-EXPAT-7908400
- https://snyk.io/vuln/SNYK-ALPINE319-EXPAT-7908409
- https://snyk.io/vuln/SNYK-ALPINE319-CURL-8602542
- https://snyk.io/vuln/SNYK-ALPINE319-CURL-8602542
- https://snyk.io/vuln/SNYK-ALPINE319-EXPAT-7908399

Author: snyk-bot

Dockerfile

@@ -22,7 +22,7 @@ COPY web /app/web
 RUN flutter build web
 
 
-FROM nginx:1.25-alpine
+FROM nginx:1.27.4-alpine
 
 LABEL maintainer="Paulo Salgado <[email protected]>"
 LABEL version="1.0.0-1"