Fixed health check in docker compose files

web-apache-pgsql/alpine/Dockerfile

@@ -34,6 +34,7 @@ RUN addgroup zabbix && \
     apk add ${APK_FLAGS_PERSISTENT} \
             apache2 \
             bash \
+            curl \
             php7-apache2 \
             php7-bcmath \
             php7-ctype \

web-apache-pgsql/centos/Dockerfile

@@ -69,6 +69,7 @@ RUN groupadd --system zabbix && \
     yum ${YUM_FLAGS_PERSISTENT} install epel-release && \
     yum ${YUM_FLAGS_PERSISTENT} install \
             dejavu-sans-fonts \
+            curl \
             httpd \
             php \
             php-bcmath \

web-apache-pgsql/ubuntu/Dockerfile

@@ -36,6 +36,7 @@ RUN locale-gen $LC_ALL && \
     apt-get ${APT_FLAGS_COMMON} update && \
     apt-get ${APT_FLAGS_PERSISTENT} install \
             apache2 \
+            curl \
             libapache2-mod-php5 \
             php5-gd \
             php5-json \