Switch scripts to bash

Closes #268, #269

0.17/Dockerfile

@@ -20,7 +20,7 @@ ENV PORT=34197 \
     PGID="$PGID"
 
 RUN mkdir -p /opt /factorio && \
-    apk add --update --no-cache pwgen su-exec binutils gettext libintl shadow curl jq && \
+    apk add --update --no-cache pwgen su-exec binutils gettext libintl shadow curl jq bash && \
     curl -sSL "https://www.factorio.com/get-download/$VERSION/headless/linux64" \
         -o /tmp/factorio_headless_x64_$VERSION.tar.xz && \
     echo "$SHA1  /tmp/factorio_headless_x64_$VERSION.tar.xz" | sha1sum -c && \

0.17/files/docker-entrypoint.sh

@@ -35,7 +35,7 @@ if [ "$NRTMPSAVES" -gt 0 ]; then
   rm -f "$SAVES"/*.tmp.zip
 fi
 
-if [[ $UPDATE_MODS_ON_START ]]; then
+if [[ ${UPDATE_MODS_ON_START:-} ]]; then
   ./docker-update-mods.sh
 fi
 

0.17/files/scenario.sh

@@ -1,4 +1,4 @@
-#!/bin/sh -x
+#!/bin/bash -x
 if [ -z "$1" ]; then
   echo "No argument supplied"
 fi

0.17/files/scenario2map.sh

@@ -1,4 +1,4 @@
-#!/bin/sh -x
+#!/bin/bash -x
 if [ -z "$1" ]; then
   echo "No argument supplied"
 fi