[INFRA-209] Remove nginx related configurations from plane community (#7406)

* Remove deprecated Nginx configuration files and scripts, including Dockerfiles, environment scripts, and configuration templates, to streamline the project structure.

* Update environment configuration and Docker setup for proxy services

- Added LISTEN_PORT and LISTEN_SSL_PORT variables to .env.example and related files.
- Updated Docker Compose files to reference new port variables instead of deprecated NGINX_PORT.
- Adjusted README and variable documentation to reflect changes in port configuration.
- Changed build context for proxy services to use the new directory structure.

* Refactor port configuration in environment and Docker files

- Renamed LISTEN_PORT and LISTEN_SSL_PORT to LISTEN_HTTP_PORT and LISTEN_HTTPS_PORT in .env.example and related files.
- Updated Docker Compose configurations to reflect the new port variable names.
- Adjusted documentation in README and variables.env to ensure consistency with the new naming conventions.

docker-compose.yml

@@ -155,11 +155,12 @@ services:
   proxy:
     container_name: proxy
     build:
-      context: ./nginx
-      dockerfile: Dockerfile
+      context: ./apps/proxy
+      dockerfile: Dockerfile.ce
     restart: always
     ports:
-      - ${NGINX_PORT}:80
+      - ${LISTEN_HTTP_PORT}:80
+      - ${LISTEN_HTTPS_PORT}:443
     environment:
       FILE_SIZE_LIMIT: ${FILE_SIZE_LIMIT:-5242880}
       BUCKET_NAME: ${AWS_S3_BUCKET_NAME:-uploads}