Fixed running as uid=0 even with UID unset (#1475)

Author: itzg

Dockerfile

@@ -57,7 +57,7 @@ WORKDIR /data
 
 STOPSIGNAL SIGTERM
 
-ENV TYPE=VANILLA VERSION=LATEST EULA=""
+ENV TYPE=VANILLA VERSION=LATEST EULA="" UID=1000 GID=1000
 
 COPY --chmod=755 scripts/start* /
 COPY --chmod=755 bin/ /usr/local/bin/

scripts/start

@@ -3,6 +3,7 @@
 # shellcheck source=start-utils
 . "${SCRIPTS:-/}start-utils"
 
+# The Dockerfile ENVs take precedence here, but defaulting for testing consistency
 : "${UID:=1000}"
 : "${GID:=1000}"