feat: Allow specifying server version via manifest ID

Dockerfile

@@ -11,6 +11,11 @@ ENV GID=1000
 # Default timezone is UTC
 ENV TZ=Etc/UTC
 
+# Set the Depot ID for the server
+ENV DEPOT_ID=996562
+# Set a specific manifest ID to download an older version of the server, defaults to latest version
+ENV MANIFEST_ID=7306793446776857728
+
 # Install dependencies
 RUN apt-get update && \
     apt-get install -y libicu-dev gosu && \

README.md

@@ -1,6 +1,6 @@
 # SCP: Secret Laboratory Docker Server
 
-A Docker container for easily running an SCP: Secret Laboratory dedicated server.
+A Docker container for easily running an SCP: Secret Laboratory dedicated server made by (Matthew Green)[https://git.matthewgreen.gg/mgreen/scp-secret-laboratory-server-docker] and slightly modified by me to add an option to select the manifest version.
 
 ## Quick Start
 
@@ -23,6 +23,9 @@ services:
       - GID=1000
       # To set a timezone, uncomment the next line and change Etc/UTC to a TZ identifier from this [list](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones#List).
       # - TZ=Etc/UTC
+      # To use a specific server version, uncomment the next line and set a manifest ID.
+      # See the "Using an Older Server Version" section for details.
+      # - MANIFEST_ID=none
     restart: unless-stopped
 ```
 
@@ -59,6 +62,9 @@ docker run -d \
   -e GID=1000 \
   # To set a timezone, uncomment the next line and change Etc/UTC to a TZ identifier from this [list](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones#List).
   # -e TZ=Etc/UTC \
+  # To use a specific server version, uncomment the next line and set a manifest ID.
+  # See the "Using an Older Server Version" section for details.
+  # -e MANIFEST_ID=none \
   --restart unless-stopped \
   greenmatthew/scp-secret-laboratory-server:latest
 ```
@@ -79,6 +85,18 @@ Mounting the .config directory allows you to configure any server setting and ha
 - `UID`: User ID to run the server as (default: 1000)
 - `GID`: Group ID to run the server as (default: 1000)
 - `TZ`: [Timezone identifier](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones#List) for the container (default: Etc/UTC). Examples: `America/Chicago`, `Europe/London`, `Asia/Tokyo`
+- `DEPOT_ID`: The Steam Depot ID for the server files (default: `996562`). This generally should not be changed.
+- `MANIFEST_ID`: The Steam Manifest ID for a specific server version (default: `none`). See the "Using an Older Server Version" section for details.
+
+## Using an Older Server Version
+
+You can run an older version of the SCP:SL dedicated server by specifying a manifest ID. This is useful for compatibility with certain mods or for playing on a specific game version.
+
+You can find a list of available manifest IDs on SteamDB. Note that you may need to be logged into Steam (e.g. via the SteamDB browser extension) to see the full list of historical manifests.
+
+[`https://steamdb.info/depot/996562/manifests/`](https://steamdb.info/depot/996562/manifests/)
+
+Once you have a manifest ID, set it using the `MANIFEST_ID` environment variable. When the container starts, it will download and run the server version corresponding to the specified manifest ID. To go back to the latest version, simply remove the `MANIFEST_ID` environment variable or set it back to `none`.
 
 ## Port Configuration
 

compose.yaml

@@ -0,0 +1,18 @@
+services:
+  scp-sl-server:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    container_name: scp-sl-server
+    ports:
+      - "7777:7777/udp"
+    volumes:
+      - ./config:/home/steam/.config
+    environment:
+      - UID=1000
+      - GID=1000
+      # To set a timezone, uncomment the next line and change Etc/UTC to a TZ identifier from this [list](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones#List).
+      # - TZ=Etc/UTC
+      # To download a specific version of the server, uncomment the next line and set the value to a valid manifest ID.
+      # - MANIFEST_ID=none
+    restart: unless-stopped

start.sh

@@ -4,7 +4,29 @@ set -e
 echo "Current user is: $(whoami)"
 
 # Install/update SCP:SL server
-steamcmd +force_install_dir $SERVER_DIR +login anonymous +app_update 996560 validate +quit
+if [ "$MANIFEST_ID" = "none" ]; then
+    echo "MANIFEST_ID not set, downloading latest server version..."
+    steamcmd +force_install_dir $SERVER_DIR +login anonymous +app_update 996560 validate +quit
+else
+    echo "MANIFEST_ID set to $MANIFEST_ID, downloading specific server version..."
+    # download_depot downloads to a specific folder, not the one specified by force_install_dir
+    # It will be downloaded to <install_dir>/steamapps/content/app_<id>/depot_<id>
+    steamcmd +login anonymous +download_depot 996560 $DEPOT_ID $MANIFEST_ID +quit
+
+    DEPOT_DOWNLOAD_DIR="$INSTALL_DIR/steamapps/content/app_996560/depot_$DEPOT_ID"
+
+    if [ -d "$DEPOT_DOWNLOAD_DIR" ] && [ "$(ls -A "$DEPOT_DOWNLOAD_DIR")" ]; then
+        echo "Depot downloaded successfully. Clearing server directory..."
+        find "$SERVER_DIR" -mindepth 1 -delete
+        echo "Copying downloaded files from $DEPOT_DOWNLOAD_DIR to $SERVER_DIR"
+        cp -rT "$DEPOT_DOWNLOAD_DIR" "$SERVER_DIR"
+        echo "Successfully copied files."
+    else
+        echo "Error: Depot download failed or the directory is empty." >&2
+        echo "Please check MANIFEST_ID ($MANIFEST_ID) and DEPOT_ID ($DEPOT_ID)" >&2
+        exit 1
+    fi
+fi
 
 # Ensure config directory exists
 INTERNAL_CONFIG_SUBDIR="$CONFIG_DIR/SCP Secret Laboratory/config/"