Configure proper proxy header pass to OpenAPI

[gavlyukovskiy]

No description provided.

[Copilot]

Pull Request Overview

This PR configures proper proxy header passing to OpenAPI by replacing the custom Swagger reverse proxy configuration with Spring Boot's built-in forwarded headers strategy and nginx proxy headers.

Key changes:

• Replaces custom SwaggerBehindReverseProxyConfig with Spring's native server.forward-headers-strategy=framework
• Adds X-Forwarded-Prefix header in nginx configuration to properly handle the /api path prefix
• Removes the OPEN_API_SUFFIX environment variable and related SpringDoc custom URL configurations

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
deployment/nginx.conf	Adds X-Forwarded-Prefix header to pass /api prefix to backend
deployment/docker-compose.yaml	Removes OPEN_API_SUFFIX env var, changes JVM_TOOL_OPTS to JAVA_OPTS, comments out watchtower service
deployment/README.md	Adds duplicated Operations section with same commands
backend/src/main/resources/application.properties	Enables Spring's forwarded headers strategy, removes custom OpenAPI suffix configuration
backend/src/main/java/net/hackyourfuture/coursehub/SwaggerBehindReverseProxyConfig.java	Removes entire custom Swagger reverse proxy configuration class
backend/src/main/java/net/hackyourfuture/coursehub/CourseHubApplication.java	Removes trailing blank line
.github/workflows/on-release-tag.yml	Sets working directory for frontend build job

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