enable healthcheck in apache-php and fix misc errors from last commit (google#40)

Author: sirdarckcat

infrastructure/kctf-samples/apache-php/chal.conf

@@ -1,4 +1,4 @@
 # this file will be sourced by the deployment scripts
 DEPLOY=true
 PUBLIC=false
-HEALTHCHECK=false
+HEALTHCHECK=true

infrastructure/kctf-samples/apache-php/challenge/config/kustomization.yaml

@@ -1,7 +1,7 @@
 configMapGenerator:
 - name: apache-php-config
   files:
-  - apache-nsjail-php.conf
+  - apache2-nsjail-php.conf
   - nsjail-php.cfg
 generatorOptions:
   disableNameSuffixHash: true

infrastructure/kctf-samples/apache-php/healthcheck/exploit/run.sh

@@ -5,6 +5,9 @@ set -Eeuo pipefail
 TIMEOUT=20
 PERIOD=30
 
+export TERM=linux
+export TERMINFO=/etc/terminfo
+
 while true; do
   source /config/env
   date