feat: enforce right version of forge

docker/Dockerfile.amd64

@@ -1,14 +1,22 @@
-FROM ghcr.io/dockhippie/minecraft-forge:47.2-amd64
+FROM ghcr.io/dockhippie/minecraft-vanilla:1.20.1-arm64 AS build
 
 EXPOSE 25565 25575 8123
 
+ENV FORGE_VERSION 47.1.84
+ENV FORGE_URL https://maven.minecraftforge.net/net/minecraftforge/forge/${MINECRAFT_VERSION}-${FORGE_VERSION}/forge-${MINECRAFT_VERSION}-${FORGE_VERSION}-installer.jar
+
 ENV DYNMAP_JAR Dynmap-3.7-beta-4-forge-1.20.jar
 ENV DYNMAP_URL https://mediafilez.forgecdn.net/files/4979/24/${DYNMAP_JAR}
 
 RUN apt-get update && \
     apt-get upgrade -y && \
     apt-get clean && \
     rm -rf /var/lib/apt/lists/* && \
+    curl --create-dirs -sLo /usr/share/minecraft/forge-${MINECRAFT_VERSION}-${FORGE_VERSION}-installer.jar ${FORGE_URL} && \
+    cd /usr/share/minecraft && \
+    mkdir mods && \
+    java -jar forge-${MINECRAFT_VERSION}-${FORGE_VERSION}-installer.jar --installServer && \
+    rm -f forge-${MINECRAFT_VERSION}-${FORGE_VERSION}-installer.jar forge-${MINECRAFT_VERSION}-${FORGE_VERSION}-installer.jar.log run.bat run.sh && \
     curl --create-dirs -sLo /usr/share/minecraft/mods/${DYNMAP_JAR} ${DYNMAP_URL}
 
 ENV MINECRAFT_LEVEL_TYPE DEFAULT

docker/Dockerfile.arm64

@@ -1,14 +1,22 @@
-FROM ghcr.io/dockhippie/minecraft-forge:47.2-arm64
+FROM ghcr.io/dockhippie/minecraft-vanilla:1.20.1-amd64 AS build
 
 EXPOSE 25565 25575 8123
 
+ENV FORGE_VERSION 47.1.84
+ENV FORGE_URL https://maven.minecraftforge.net/net/minecraftforge/forge/${MINECRAFT_VERSION}-${FORGE_VERSION}/forge-${MINECRAFT_VERSION}-${FORGE_VERSION}-installer.jar
+
 ENV DYNMAP_JAR Dynmap-3.7-beta-4-forge-1.20.jar
 ENV DYNMAP_URL https://mediafilez.forgecdn.net/files/4979/24/${DYNMAP_JAR}
 
 RUN apt-get update && \
     apt-get upgrade -y && \
     apt-get clean && \
     rm -rf /var/lib/apt/lists/* && \
+    curl --create-dirs -sLo /usr/share/minecraft/forge-${MINECRAFT_VERSION}-${FORGE_VERSION}-installer.jar ${FORGE_URL} && \
+    cd /usr/share/minecraft && \
+    mkdir mods && \
+    java -jar forge-${MINECRAFT_VERSION}-${FORGE_VERSION}-installer.jar --installServer && \
+    rm -f forge-${MINECRAFT_VERSION}-${FORGE_VERSION}-installer.jar forge-${MINECRAFT_VERSION}-${FORGE_VERSION}-installer.jar.log run.bat run.sh && \
     curl --create-dirs -sLo /usr/share/minecraft/mods/${DYNMAP_JAR} ${DYNMAP_URL}
 
 ENV MINECRAFT_LEVEL_TYPE DEFAULT

overlay/etc/container.d/25-mods.sh

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+
+if [ ! -d ${MINECRAFT_MODS_DIR} ]; then
+    echo "> creating mods dir"
+    mkdir -p ${MINECRAFT_MODS_DIR}
+fi

overlay/etc/entrypoint.d/20-forge.sh

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+
+declare -x MINECRAFT_MODS_DIR
+[[ -z "${MINECRAFT_MODS_DIR}" ]] && MINECRAFT_MODS_DIR="${MINECRAFT_GAME_DIR}/mods"
+
+true

overlay/usr/bin/container

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+set -eo pipefail
+source /usr/bin/entrypoint
+
+for FILE in $(find /etc/container.d -type f -iname \*.sh | sort); do
+    source ${FILE}
+done
+
+pushd ${MINECRAFT_GAME_DIR} >/dev/null
+    STARTCMD="su-exec minecraft java"
+
+    if [ -n "${MINECRAFT_MAXHEAP}" ]; then
+        STARTCMD="${STARTCMD} -Xmx${MINECRAFT_MAXHEAP}"
+    fi
+
+    if [ -n "${MINECRAFT_MINHEAP}" ]; then
+        STARTCMD="${STARTCMD} -Xms${MINECRAFT_MINHEAP}"
+    fi
+
+    echo "> starting minecraft server"
+    exec ${STARTCMD} ${JAVA_OPTS} @libraries/net/minecraftforge/forge/${MINECRAFT_VERSION}-${FORGE_VERSION}/unix_args.txt ${MINECRAFT_OPTS}
+popd >/dev/null