use fqin for container images (#125)

It's generally considered a better practice and it's more portable allowing podman to work without having to modify the name.

Reviewed-on: https://gitea.com/gitea/docs/pulls/125
Reviewed-by: Lunny Xiao <lunny@noreply.gitea.com>
Co-authored-by: TheFox0x7 <thefox0x7@gmail.com>
Co-committed-by: TheFox0x7 <thefox0x7@gmail.com>

docs/installation/with-docker-rootless.md

@@ -20,7 +20,7 @@ the official [install instructions](https://docs.docker.com/compose/install/).
 
 ## Basics
 
-The most simple setup just creates a volume and a network and starts the `gitea/gitea:latest-rootless`
+The most simple setup just creates a volume and a network and starts the `docker.io/gitea/gitea:latest-rootless`
 image as a service. Since there is no database available, one can be initialized using SQLite3.
 
 Create a directory for `data` and `config`:
@@ -38,7 +38,7 @@ version: "2"
 
 services:
   server:
-    image: gitea/gitea:@dockerVersion@-rootless
+    image: docker.io/gitea/gitea:@dockerVersion@-rootless
     restart: always
     volumes:
       - ./data:/var/lib/gitea
@@ -71,7 +71,7 @@ version: "2"
 
 services:
   server:
-    image: gitea/gitea:@dockerVersion@-rootless
+    image: docker.io/gitea/gitea:@dockerVersion@-rootless
     restart: always
     volumes:
       - ./data:/var/lib/gitea
@@ -95,7 +95,7 @@ version: "2"
 
 services:
   server:
-    image: gitea/gitea:@dockerVersion@-rootless
+    image: docker.io/gitea/gitea:@dockerVersion@-rootless
 +    environment:
 +      - GITEA__database__DB_TYPE=mysql
 +      - GITEA__database__HOST=db:3306
@@ -115,7 +115,7 @@ services:
 +      - db
 +
 +  db:
-+    image: mysql:8
++    image: docker.io/library/mysql:8
 +    restart: always
 +    environment:
 +      - MYSQL_ROOT_PASSWORD=gitea
@@ -136,7 +136,7 @@ version: "2"
 
 services:
   server:
-    image: gitea/gitea:@dockerVersion@-rootless
+    image: docker.io/gitea/gitea:@dockerVersion@-rootless
     environment:
 +      - GITEA__database__DB_TYPE=postgres
 +      - GITEA__database__HOST=db:5432
@@ -156,7 +156,7 @@ services:
 +      - db
 +
 +  db:
-+    image: postgres:14
++    image: docker.io/library/postgres:14
 +    restart: always
 +    environment:
 +      - POSTGRES_USER=gitea
@@ -184,7 +184,7 @@ version: "2"
 +
 services:
   server:
-    image: gitea/gitea:@dockerVersion@-rootless
+    image: docker.io/gitea/gitea:@dockerVersion@-rootless
     restart: always
     volumes:
 -      - ./data:/var/lib/gitea
@@ -211,7 +211,7 @@ version: "2"
 
 services:
   server:
-    image: gitea/gitea:@dockerVersion@-rootless
+    image: docker.io/gitea/gitea:@dockerVersion@-rootless
     restart: always
 +    user: 1001
     volumes:
@@ -283,7 +283,7 @@ docker-compose up -d
 - Rename folder (inside volume) gitea to custom
 - Edit app.ini if needed
   - Set START_SSH_SERVER = true
-- Use image gitea/gitea:@dockerVersion@-rootless
+- Use image docker.io/gitea/gitea:@dockerVersion@-rootless
 
 ## Managing Deployments With Environment Variables
 

docs/installation/with-docker.md

@@ -18,7 +18,7 @@ the official [install instructions](https://docs.docker.com/compose/install/).
 
 ## Basics
 
-The most simple setup just creates a volume and a network and starts the `gitea/gitea:latest`
+The most simple setup just creates a volume and a network and starts the `docker.io/gitea/gitea:latest`
 image as a service. Since there is no database available, one can be initialized using SQLite3.
 Create a directory like `gitea` and paste the following content into a file named `docker-compose.yml`.
 Note that the volume should be owned by the user/group with the UID/GID specified in the config file.
@@ -34,7 +34,7 @@ networks:
 
 services:
   server:
-    image: gitea/gitea:@dockerVersion@
+    image: docker.io/gitea/gitea:@dockerVersion@
     container_name: gitea
     environment:
       - USER_UID=1000
@@ -66,7 +66,7 @@ networks:
 
 services:
   server:
-    image: gitea/gitea:@dockerVersion@
+    image: docker.io/gitea/gitea:@dockerVersion@
     container_name: gitea
     environment:
       - USER_UID=1000
@@ -101,7 +101,7 @@ networks:
 
 services:
   server:
-    image: gitea/gitea:@dockerVersion@
+    image: docker.io/gitea/gitea:@dockerVersion@
     container_name: gitea
     environment:
       - USER_UID=1000
@@ -125,7 +125,7 @@ services:
 +      - db
 +
 +  db:
-+    image: mysql:8
++    image: docker.io/library/mysql:8
 +    restart: always
 +    environment:
 +      - MYSQL_ROOT_PASSWORD=gitea
@@ -152,7 +152,7 @@ networks:
 
 services:
   server:
-    image: gitea/gitea:@dockerVersion@
+    image: docker.io/gitea/gitea:@dockerVersion@
     container_name: gitea
     environment:
       - USER_UID=1000
@@ -176,7 +176,7 @@ services:
 +      - db
 +
 +  db:
-+    image: postgres:14
++    image: docker.io/library/postgres:14
 +    restart: always
 +    environment:
 +      - POSTGRES_USER=gitea
@@ -208,7 +208,7 @@ networks:
 +
 services:
   server:
-    image: gitea/gitea:@dockerVersion@
+    image: docker.io/gitea/gitea:@dockerVersion@
     container_name: gitea
     restart: always
     networks:
@@ -316,8 +316,8 @@ Gitea will generate new secrets/tokens for every new installation automatically
 The following commands will output a new `SECRET_KEY` and `INTERNAL_TOKEN` to `stdout`, which you can then place in your environment variables.
 
 ```bash
-docker run -it --rm gitea/gitea:1 gitea generate secret SECRET_KEY
-docker run -it --rm  gitea/gitea:1 gitea generate secret INTERNAL_TOKEN
+docker run -it --rm docker.io/gitea/gitea:1 gitea generate secret SECRET_KEY
+docker run -it --rm docker.io/gitea/gitea:1 gitea generate secret INTERNAL_TOKEN
 ```
 
 ```yaml