chore: Remove legacy Docker configuration and documentation

### Summary of Changes
- Deleted `docker-compose.dev.yml` and `docker-compose.yml` files to streamline the project structure.
- Removed outdated Dockerfiles for services (API Gateway, Service Adapters, API Docs, and Frontend) to eliminate redundancy.
- Updated `env.example` to reflect changes in service configurations, including local host settings for PostgreSQL and Redis.
- Revised `README.md` to remove references to Docker deployment and clarify local development setup instructions.
- Cleaned up documentation structure by removing obsolete files related to Docker rate limits and compatibility fixes.

### Expected Results
- Simplified project setup and improved clarity for developers by focusing on current configurations and removing legacy artifacts.

docs/DOCKER_RATE_LIMIT_FIX.md

@@ -1,201 +0,0 @@
-# Docker Hub Rate Limit Fix
-
-## Problem
-```
-Error response from daemon: toomanyrequests: You have reached your unauthenticated pull rate limit. https://www.docker.com/increase-rate-limit
-```
-
-Docker Hub has strict rate limits:
-- **Unauthenticated**: 100 pulls per 6 hours per IP
-- **Authenticated (free)**: 200 pulls per 6 hours per user
-- **Pro/Team**: Higher limits
-
-## Solutions
-
-### Solution 1: Use Docker Hub Authentication (Recommended)
-
-#### 1.1. Create Docker Hub Account
-1. Go to [Docker Hub](https://hub.docker.com)
-2. Create a free account
-3. Note your username and password
-
-#### 1.2. Update Runner Configurations
-
-Add Docker authentication to each runner config:
-
-**`runners/config_heavy.yaml`:**
-```yaml
-container:
-  # Docker registry authentication
-  docker_username: "your_dockerhub_username"
-  docker_password: "your_dockerhub_password"
-```
-
-**`runners/config_light.yaml`:**
-```yaml
-container:
-  # Docker registry authentication
-  docker_username: "your_dockerhub_username"
-  docker_password: "your_dockerhub_password"
-```
-
-**`runners/config_docker.yaml`:**
-```yaml
-container:
-  # Docker registry authentication
-  docker_username: "your_dockerhub_username"
-  docker_password: "your_dockerhub_password"
-```
-
-**`runners/config_security.yaml`:**
-```yaml
-container:
-  # Docker registry authentication
-  docker_username: "your_dockerhub_username"
-  docker_password: "your_dockerhub_password"
-```
-
-#### 1.3. Alternative: Use Environment Variables
-
-Instead of hardcoding credentials, use environment variables:
-
-**Update `runners/.env.runners`:**
-```bash
-# Docker Hub credentials
-DOCKER_USERNAME=your_dockerhub_username
-DOCKER_PASSWORD=your_dockerhub_password
-```
-
-**Update config files:**
-```yaml
-container:
-  docker_username: ${DOCKER_USERNAME}
-  docker_password: ${DOCKER_PASSWORD}
-```
-
-### Solution 2: Use Alternative Registries
-
-#### 2.1. Use GitHub Container Registry (ghcr.io)
-
-Update image references to use GitHub's registry:
-
-**Heavy Runner:**
-```yaml
-labels:
-  - "java:docker://ghcr.io/openjdk/openjdk:17-jdk-slim"
-  - "python:docker://ghcr.io/library/python:3.11-slim"
-```
-
-**Light Runner:**
-```yaml
-labels:
-  - "nodejs:docker://ghcr.io/library/node:20-slim"
-  - "frontend:docker://ghcr.io/library/node:20-slim"
-```
-
-#### 2.2. Use Quay.io Registry
-
-```yaml
-labels:
-  - "java:docker://quay.io/eclipse/alpine_jdk17:latest"
-  - "python:docker://quay.io/python/python:3.11-slim"
-  - "nodejs:docker://quay.io/node/node:20-slim"
-```
-
-### Solution 3: Use Local Image Caching
-
-#### 3.1. Pre-pull Images on Runner Host
-
-```bash
-# On your runner host machine
-docker pull openjdk:17-jdk-slim
-docker pull python:3.11-slim
-docker pull node:20-slim
-docker pull docker:24-dind
-docker pull alpine:3.19
-
-# Tag as local images
-docker tag openjdk:17-jdk-slim localhost:5000/openjdk:17-jdk-slim
-docker tag python:3.11-slim localhost:5000/python:3.11-slim
-docker tag node:20-slim localhost:5000/node:20-slim
-docker tag docker:24-dind localhost:5000/docker:24-dind
-docker tag alpine:3.19 localhost:5000/alpine:3.19
-```
-
-#### 3.2. Update Config to Use Local Images
-
-```yaml
-labels:
-  - "java:docker://localhost:5000/openjdk:17-jdk-slim"
-  - "python:docker://localhost:5000/python:3.11-slim"
-  - "nodejs:docker://localhost:5000/node:20-slim"
-```
-
-### Solution 4: Reduce Image Pulls
-
-#### 4.1. Disable Force Pull
-
-Update all config files:
-```yaml
-container:
-  # Don't pull if image already exists
-  force_pull: false
-```
-
-#### 4.2. Use Image Caching
-
-```yaml
-container:
-  # Enable image caching
-  force_pull: false
-  force_rebuild: false
-```
-
-### Solution 5: Use Self-Hosted Registry
-
-#### 5.1. Set up Local Registry
-
-```bash
-# Run local Docker registry
-docker run -d -p 5000:5000 --name registry registry:2
-
-# Mirror images to local registry
-docker pull openjdk:17-jdk-slim
-docker tag openjdk:17-jdk-slim localhost:5000/openjdk:17-jdk-slim
-docker push localhost:5000/openjdk:17-jdk-slim
-```
-
-#### 5.2. Update Configs to Use Local Registry
-
-```yaml
-labels:
-  - "java:docker://localhost:5000/openjdk:17-jdk-slim"
-```
-
-## Recommended Approach
-
-**For immediate fix**: Use Solution 1 (Docker Hub authentication)
-**For long-term**: Combine Solutions 1 + 4 (auth + caching)
-
-## Implementation Steps
-
-1. **Create Docker Hub account** (if you don't have one)
-2. **Update `.env.runners`** with credentials
-3. **Update all config files** with authentication
-4. **Set `force_pull: false`** to reduce pulls
-5. **Test with a simple job**
-
-## Verification
-
-After implementing, test with:
-```bash
-# Check if authentication works
-docker login
-docker pull openjdk:17-jdk-slim
-```
-
-## References
-
-- [Docker Hub Rate Limits](https://www.docker.com/increase-rate-limit)
-- [Gitea Actions Documentation](https://docs.gitea.com/usage/actions/design#act-runner)
-- [Docker Registry Authentication](https://docs.docker.com/engine/reference/commandline/login/)

docs/structure.txt

@@ -149,12 +149,7 @@ runners/
 # Scripts
 scripts/
 ├── check-registry.ps1        # Windows PowerShell registry check script
-├── check-registry.sh         # Linux/macOS registry check script
-├── docker-compatibility.ps1  # Windows PowerShell Docker compatibility fix
-├── docker-compatibility.sh   # Linux/macOS Docker compatibility fix
-├── fix-docker-compatibility.ps1 # Windows PowerShell quick fix script
-├── fix-docker-compatibility.sh  # Linux/macOS quick fix script
-└── test-docker-compatibility.ps1 # Windows PowerShell compatibility test
+└── check-registry.sh         # Linux/macOS registry check script
 
 └── docs/                      # Documentation
     ├── specs.md              # Project specifications
@@ -163,9 +158,6 @@ scripts/
     ├── RUNNERS.md            # Gitea runners setup and management
     ├── RUNNER_LABELS.md      # Runner labels technical documentation
     ├── OPTIMIZATION_RECOMMENDATIONS.md # CI/CD optimization recommendations
-    ├── DOCKER_RATE_LIMIT_FIX.md # Docker Hub rate limit solutions
     ├── CI_CD.md              # CI/CD pipeline documentation
     ├── CACHE_TROUBLESHOOTING.md # Cache troubleshooting guide
-    ├── SONARQUBE_INTEGRATION.md # SonarQube integration documentation
-    ├── DOCKER_DEPLOYMENT.md  # Docker deployment and registry guide
-    └── DOCKER_COMPATIBILITY.md # Docker version compatibility guide
+    ├── SONARQUBE_INTEGRATION.md # SonarQube integration documentation