Publish Docker image to Gitea registry

DOCKER.md

@@ -1,18 +1,39 @@
 # Docker Usage
 
-Build and run the app with Docker Compose:
+The default compose file pulls the image from the Gitea Container Registry:
 
 ```powershell
-docker compose up --build
+docker compose pull
+docker compose up -d
+```
+
+Default image:
+
+```text
+gitea.mouse84.com/kim.kanghee/idrac-info:latest
+```
+
+Use a specific image tag:
+
+```powershell
+$env:IDRAC_INFO_IMAGE = "gitea.mouse84.com/kim.kanghee/idrac-info:<commit-sha>"
+docker compose pull
+docker compose up -d
+```
+
+Build locally instead of pulling:
+
+```powershell
+docker compose -f docker-compose.yml -f docker-compose.build.yml up --build -d
 ```
 
 Build only:
 
 ```powershell
-docker build -t idrac-info:local .
+docker build -t gitea.mouse84.com/kim.kanghee/idrac-info:local .
 ```
 
-Run the built image without Compose:
+Run the pulled image without Compose:
 
 ```powershell
 docker run --rm --network host `
@@ -21,7 +42,7 @@ docker run --rm --network host `
   -e AUTO_BOOTSTRAP_DB=true `
   -v ${PWD}/data:/app/data `
   -v ${PWD}/backend/instance:/app/backend/instance `
-  idrac-info:local
+  gitea.mouse84.com/kim.kanghee/idrac-info:latest
 ```
 
 Open the app:
@@ -42,7 +63,7 @@ process already uses `6050` on the host.
 Run in the background:
 
 ```powershell
-docker compose up --build -d
+docker compose up -d
 ```
 
 Stop the container:
@@ -75,7 +96,7 @@ The container defaults to port `6050`. To use a different host port:
 
 ```powershell
 $env:FLASK_PORT = "8080"
-docker compose up --build
+docker compose up -d
 ```
 
 Then open:
@@ -117,7 +138,22 @@ call `racadm` directly.
 After building, verify the tools inside the image:
 
 ```powershell
-docker run --rm idrac-info:local sh -lc "command -v racadm && command -v ipmitool && ipmitool -V"
+docker run --rm gitea.mouse84.com/kim.kanghee/idrac-info:latest sh -lc "command -v racadm && command -v ipmitool && ipmitool -V"
+```
+
+## Registry
+
+Gitea Actions builds and pushes these tags on `main`:
+
+```text
+gitea.mouse84.com/kim.kanghee/idrac-info:latest
+gitea.mouse84.com/kim.kanghee/idrac-info:<short-sha>
+```
+
+If the package is private, log in before pulling:
+
+```powershell
+docker login gitea.mouse84.com
 ```
 
 Host networking works as expected on Linux Docker hosts. Docker Desktop on