Modify default exposed port (#1681)

* Modify default exposed port

* Update changelog

CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
+- Set the exposed port as an environment variable (`PORT`) in `Dockerfile`
 - Upgraded `chart.js` from version `4.0.1` to `4.2.0`
 - Upgraded `prettier` from version `2.8.1` to `2.8.4`
 

Dockerfile

@@ -57,5 +57,5 @@ RUN apt update && apt install -y \
 
 COPY --from=builder /ghostfolio/dist/apps /ghostfolio/apps
 WORKDIR /ghostfolio/apps/api
-EXPOSE 3333
+EXPOSE ${PORT:-3333}
 CMD [  "yarn", "start:prod" ]