docs: Update documentation to use V1 environment variables

openhands/usage/advanced/custom-sandbox-guide.mdx

@@ -52,7 +52,7 @@ This will produce a new image called `custom-image`, which will be available in
 ## Using the Docker Command
 
 When running OpenHands using [the docker command](/usage/run-openhands/local-setup#start-the-app), replace
-`-e SANDBOX_RUNTIME_CONTAINER_IMAGE=...` with `-e SANDBOX_BASE_CONTAINER_IMAGE=<custom image name>`:
+the `AGENT_SERVER_IMAGE_REPOSITORY` and `AGENT_SERVER_IMAGE_TAG` environment variables with `-e SANDBOX_BASE_CONTAINER_IMAGE=<custom image name>`:
 
 ```commandline
 docker run -it --rm --pull=always \

openhands/usage/cli/installation.mdx

@@ -65,7 +65,8 @@ description: Install the OpenHands CLI on your system
     ```bash
     docker run -it \
         --pull=always \
-        -e SANDBOX_RUNTIME_CONTAINER_IMAGE=docker.openhands.dev/openhands/runtime:1.2-nikolaik \
+        -e AGENT_SERVER_IMAGE_REPOSITORY=docker.openhands.dev/openhands/runtime \
+        -e AGENT_SERVER_IMAGE_TAG=1.2-nikolaik \
         -e SANDBOX_USER_ID=$(id -u) \
         -e SANDBOX_VOLUMES=$SANDBOX_VOLUMES \
         -v /var/run/docker.sock:/var/run/docker.sock \

openhands/usage/environment-variables.mdx

@@ -107,7 +107,8 @@ These variables correspond to the `[sandbox]` section in `config.toml`:
 | `SANDBOX_RUNTIME_STARTUP_ENV_VARS` | dict | `{}` | Environment variables for runtime |
 | `SANDBOX_BROWSERGYM_EVAL_ENV` | string | `""` | BrowserGym evaluation environment |
 | `SANDBOX_VOLUMES` | string | `""` | Volume mounts (replaces deprecated workspace settings) |
-| `SANDBOX_RUNTIME_CONTAINER_IMAGE` | string | `""` | Pre-built runtime container image |
+| `AGENT_SERVER_IMAGE_REPOSITORY` | string | `""` | Runtime container image repository (e.g., `docker.openhands.dev/openhands/runtime`) |
+| `AGENT_SERVER_IMAGE_TAG` | string | `""` | Runtime container image tag (e.g., `1.2-nikolaik`) |
 | `SANDBOX_KEEP_RUNTIME_ALIVE` | boolean | `false` | Keep runtime alive after session ends |
 | `SANDBOX_PAUSE_CLOSED_RUNTIMES` | boolean | `false` | Pause instead of stopping closed runtimes |
 | `SANDBOX_CLOSE_DELAY` | integer | `300` | Delay before closing idle runtimes (seconds) |

openhands/usage/llms/local-llms.mdx

@@ -71,7 +71,8 @@ Download and install the LM Studio desktop app from [lmstudio.ai](https://lmstud
 docker pull docker.openhands.dev/openhands/runtime:1.2-nikolaik
 
 docker run -it --rm --pull=always \
-    -e SANDBOX_RUNTIME_CONTAINER_IMAGE=docker.openhands.dev/openhands/runtime:1.2-nikolaik \
+    -e AGENT_SERVER_IMAGE_REPOSITORY=docker.openhands.dev/openhands/runtime \
+    -e AGENT_SERVER_IMAGE_TAG=1.2-nikolaik \
     -e LOG_ALL_EVENTS=true \
     -v /var/run/docker.sock:/var/run/docker.sock \
     -v ~/.openhands:/.openhands \

openhands/usage/run-openhands/local-setup.mdx

@@ -124,7 +124,8 @@ Note that you'll still need `uv` installed for the default MCP servers to work p
 docker pull docker.openhands.dev/openhands/runtime:1.2-nikolaik
 
 docker run -it --rm --pull=always \
-    -e SANDBOX_RUNTIME_CONTAINER_IMAGE=docker.openhands.dev/openhands/runtime:1.2-nikolaik \
+    -e AGENT_SERVER_IMAGE_REPOSITORY=docker.openhands.dev/openhands/runtime \
+    -e AGENT_SERVER_IMAGE_TAG=1.2-nikolaik \
     -e LOG_ALL_EVENTS=true \
     -v /var/run/docker.sock:/var/run/docker.sock \
     -v ~/.openhands:/.openhands \

openhands/usage/runtimes/docker.mdx

@@ -4,8 +4,9 @@ description: This is the default Runtime that's used when you start OpenHands.
 ---
 
 ## Image
-The `SANDBOX_RUNTIME_CONTAINER_IMAGE` from nikolaik is a pre-built runtime image
+The runtime image from nikolaik is a pre-built runtime image
 that contains our Runtime server, as well as some basic utilities for Python and NodeJS.
+You can specify a custom runtime image using the `AGENT_SERVER_IMAGE_REPOSITORY` and `AGENT_SERVER_IMAGE_TAG` environment variables.
 You can also [build your own runtime image](/openhands/usage/advanced/custom-sandbox-guide).
 
 ## Connecting to Your filesystem

openhands/usage/troubleshooting/troubleshooting.mdx

@@ -86,7 +86,8 @@ To fix this:
    ```bash
    docker run -it --rm \
        -e SANDBOX_VSCODE_PORT=41234 \
-       -e SANDBOX_RUNTIME_CONTAINER_IMAGE=docker.openhands.dev/openhands/runtime:latest \
+       -e AGENT_SERVER_IMAGE_REPOSITORY=docker.openhands.dev/openhands/runtime \
+       -e AGENT_SERVER_IMAGE_TAG=latest \
        -v /var/run/docker.sock:/var/run/docker.sock \
        -v ~/.openhands:/.openhands \
        -p 3000:3000 \