fix: removed Java 8 constraint of Canyon server type

#1129

README.md

@@ -502,17 +502,15 @@ A [Catserver](http://catserver.moe/) type server can be used with
 
 > **NOTE** Catserver only provides a single release stream, so `VERSION` is ignored
 
-### Running an Canyon server
+### Running a Canyon server
 
 [Canyon](https://github.com/canyonmodded/canyon) is a fork of CraftBukkit for Minecraft Beta 1.7.3. It includes multiple enhancements whilst also retaining compatibility with old Bukkit plugins and mods as much as possible.
 
     -e VERSION=b1.7.3 -e TYPE=CANYON
 
-> **NOTE** only `VERSION=b1.7.3` is supported
+> **NOTE** only `VERSION=b1.7.3` is supported. Since that version pre-dates the health check mechanism used by this image, that will need to be disabled by setting `DISABLE_HEALTHCHECK=true`.
 
-> **NOTE** only Java 8 is supported
-
-By default the latest build will be used; however, a specific build number can be selected by setting `CANYON_BUILD`, such as
+By default, the latest build will be used; however, a specific build number can be selected by setting `CANYON_BUILD`, such as
 
     -e CANYON_BUILD=11
 

scripts/start-deployCanyon

@@ -2,16 +2,11 @@
 set -euo pipefail
 IFS=$'\n\t'
 
-. ${SCRIPTS:-/}start-utils
+# shellcheck source=start-utils
+. "${SCRIPTS:-/}start-utils"
 isDebugging && set -x
 
-: ${CANYON_BUILD:=lastSuccessfulBuild}
-JAVA_VER=$(java -version 2>&1 | head -1 | cut -d'"' -f2 | sed '/^1\./s///' | cut -d'.' -f1)
-
-if [ "${JAVA_VER}" != "8" ]; then
-  log "ERROR: Canyon server type only supports Java version 8"
-  exit 1
-fi
+: "${CANYON_BUILD:=lastSuccessfulBuild}"
 
 if [ "${VERSION}" != "b1.7.3" ]; then
   log "ERROR: Canyon server type only supports VERSION=b1.7.3"